William Ralph "Dixie" Dean (22 January 1907 - 1 March 1980) was an English footballer who played as a centre forward. Born in Birkenhead, he began his career at his hometown club Tranmere Rovers before moving on to Everton, the club he had supported as a child. He was particularly known for scoring goals with his head.

His father had taken him to a league game at Goodison Park when he was eight years old. It was a dream come true for Dean when Everton secretary Thomas H. McIntosh arranged to meet him at the Woodside Hotel in 1925. Dean was so excited that he ran the 2.5 miles (4.0 km) distance from his home in north Birkenhead to the riverside to meet him. He signed for Everton in March 1925 having just turned 18.  He later revealed that he expected a PS300 signing fee to be given to his parents when he transferred to Everton. They received only PS30, and Tranmere Rovers manager Bert Cooke told him "that's all the League will allow". Dean appealed to John McKenna, chairman of the Football Association, but was told "I'm afraid you've signed, and that's it." Dean signed for Everton for PS3,000, then a record fee received for Tranmere Rovers. He made an immediate impact, scoring 32 goals in his first full season. A motorcycling accident at Holywell, North Wales in summer 1926 left Dean with a fractured skull and jaw, and doctors were unsure whether he would be able to play again. In his next game for Everton he scored using his head, leading Evertonians to joke that the doctor left a metal plate in Dean's head.  Dean's greatest point of note is he is still the only player in English football score 60 league goals in one season (1927-28). At that season's end he was 21 years old. Middlesbrough's George Camsell, who holds the highest goals-to-games ratio for England, had scored 59 league goals the previous season.  In that 1927-28 season Everton won the First Division title. When they were relegated to Second Division in 1930 Dean stayed with them. The club went on to immediately win the Second Division in 1931 followed by the First Division again in 1932. They then immediately won the FA Cup in 1933 (in which he scored in the final) - a sequence unmatched since.  In December 1933, Dean issued a public appeal to have stolen goods returned to him. The Times issued a statement: "Dixie Dean, the Everton and England forward appeals to the thief who robbed him of an international cap and presentation clock to return them. His house in Caldy Road, Walton, Liverpool was entered in his absence over Christmas, and the thief left behind gold watches and jewelry (sic)." By then, Dean was captain of the side. However, the harsh physical demands of the game (as it was played then) took their toll and he was dropped from the first team in 1937.

Using a quote from the above article, answer the following question: When did he start playing himself?
He signed for Everton in March 1925 having just turned 18.