Starting as a Substitute in the National Competition? Playing in the NBA?

Lin Feng, who grew up in Japan, has always been fond of basketball, but his talent is not good. After joining the high school team, he has been looking at the water dispenser for two years. After the main point guard was injured in a county-level game, a panel with the same system appeared in front of him. The host, Lin Feng, is 176cm tall. Bounce... Layup...