Dickson starting playing for Holcomb High School's varsity team in his sophomore year, where he averaged 4.1 points and 2.5 rebounds in 17 games. In his junior year, he averaged 9.8 points and 6.9 rebounds per game. This past season, he averaged 15.6 points and 11.5 rebounds a game.
Although he played in the post this year, he told the paper that he will need to work on his mid-range jumper and ball handling skills for next season.