Answer by taking a quote from the following article:

Bird was born in West Baden Springs, Indiana, to Georgia (nee Kerns) and Claude Joseph "Joe" Bird, a veteran of the Korean War. He was raised in nearby French Lick, where his mother worked two jobs to support Larry and his five siblings. Bird has said that being poor as a child still motivates him "to this day". Georgia and Joe divorced when Larry was in high school, and Joe committed suicide about a year later.

Bird immediately transformed the Celtics into a title contender, helping them improve their win total by 32 games from the year before he was drafted and finish first in the Eastern Conference. With averages of 21.3 points, 10.4 rebounds, 4.5 assists, and 1.7 steals per game for the season, he was selected to the All-Star Team and named Rookie of the Year. In the Conference Finals, Boston was eliminated by the Philadelphia 76ers.  Before the 1980-81 season, the Celtics selected forward Kevin McHale in the draft and acquired center Robert Parish from the Golden State Warriors, forming a Hall of Fame trio for years to come. Behind Bird's leadership and Boston's upgraded roster, the Celtics again advanced to the Conference Finals for a rematch with the 76ers. Boston fell behind 3-1 to start the series but won the next three games to advance to the Finals against the Houston Rockets, winning in six games and earning Bird his first championship. He averaged 21.9 points, 14 rebounds, 6.1 assists, and 2.3 steals per game for the postseason and 15.3 points, 15.3 rebounds, and 7 assists per game for the Finals but lost out on the Finals MVP Award to teammate Cedric Maxwell.  At the 1982 All-Star Game, Bird scored 19 points en route to winning the All-Star Game MVP Award. At the conclusion of the season, he earned his first All-Defensive Team selection. He eventually finished runner-up in Most Valuable Player Award voting to Moses Malone. In the Conference Finals, the Celtics faced the 76ers for the third consecutive year, losing in seven games. Boston's misfortunes continued into the next season, with Bird again finishing second in MVP voting to Malone and the team losing in the Conference Semifinals to the Milwaukee Bucks.  In 1988, Bird had the best statistical season of his career, but the Celtics failed to reach the NBA Finals for the first time in five years, losing to the Pistons in six games during the Eastern Conference Finals. Bird started the 1988-89 season, but ended his season after six games to have bone spurs surgically removed from both of his heels. He returned to the Celtics in 1989, but debilitating back problems and an aging Celtic roster prevented him from regaining his mid-1980s form. Nonetheless, through the final years of his career, Bird maintained his status as one of the premier players in the game. He averaged over 20 points, 9 rebounds and 7 assists a game in his last three seasons with the Celtics, and shot better than 45% from the field in each. Bird led the Celtics to playoff appearances in each of those three seasons.  Bird's body, however, continued to break down. He had been bothered by back problems for years, and his back became progressively worse. After leading the Celtics to a 29-5 start to the 1990-91 season, he missed 22 games due to a compressed nerve root in his back, a condition that would eventually lead to his retirement. He had off-season surgery to remove a disc from his back, but his back problems continued and he missed 37 games during the 1991-92 season. His past glory would be briefly rekindled, however, in a game that season in which he scored 49 points in a double-overtime victory over the Portland Trail Blazers. During the 1992 Eastern Conference semi-finals against the Cleveland Cavaliers, Bird missed four of the seven games in the series due to those recurring back problems.  In the summer of 1992, Bird joined Magic Johnson, Michael Jordan and other NBA stars to play for the United States basketball team in that year's Olympics in Barcelona, Spain. It was the first time in the United States' Olympic history that the country sent professional basketball players to compete. The "Dream Team" won the men's basketball gold medal.  Following his Olympic experience, on August 18, 1992, Bird announced his retirement as an NBA player. He finished his career with averages of more than 24 points, 10 rebounds and 6 assists per game, while shooting 49.6% from the field, 88.6% from the free throw line and 37.6% from three-point range. Following Bird's departure, the Celtics promptly retired his jersey number 33.  In 1989, Bird published his autobiography, Drive: The Story of My Life with Bob Ryan. The book chronicles his life and career up to the 1989 NBA season.  The Celtics employed Bird as a special assistant in the team's front office from 1992 until 1997. In 1997, Bird accepted the position of coach of the Indiana Pacers and said he would be on the job for no more than three years. Despite having no previous coaching experience, Bird led the Pacers to a 58-24 record--the franchise's best as an NBA team at the time--in the 1997-98 season, and pushed the Bulls to seven games in the Eastern Conference finals. He was named the NBA Coach of the Year for his efforts, becoming the only man in NBA history to have won both the MVP and Coach of the Year awards. He then led the Pacers to two consecutive Central Division titles in 1999 and 2000, and a berth in the 2000 NBA Finals. Bird will be always known for his playing in the Boston garden, but what he did in 3 years with the pacers was very remarkable and the best 3 year stretch the pacer ever had.  Bird resigned as Pacers coach shortly after the end of the 2000 season, following through on his initial promise to coach for only three years. In 2003, he returned as the Pacers' president of basketball operations, overseeing team personnel and coaching moves, as well as the team's draft selections. Bird promoted David Morway to general manager in 2008, but Bird still had the final say in basketball matters. After the 2011-2012 NBA season, Bird was named NBA Executive of the Year, becoming the only man in NBA history to win the NBA MVP, Coach of the Year and Executive of the Year.  On June 27, 2012, a day before the 2012 NBA draft, Bird and the Pacers announced that they would be parting ways later that year. Bird said health issues were among the reasons for his leaving. Donnie Walsh was named to replace him.  On June 26, 2013, almost exactly a year later, it was announced that Bird would be returning to the Pacers as president of basketball operations. Pacers owner Herb Simon briefly addressed Bird's prior health concerns, stating that "He's got his energy back, his health back and he's raring to go".  On May 1, 2017, Bird resigned as president of basketball operations, but stayed with the team in an advisory capacity.

What was his plan for post retirement?
In 1989, Bird published his autobiography, Drive: The Story of My Life with Bob Ryan. The book chronicles his life and career up to the 1989 NBA season.