self-taught
adjective uk/ˌselfˈtɔːt/ us/ˌselfˈtɑːt/
自己学会的
Someone who is self-taught has taught himself or herself a particular skill.
a self-taught musician/furniture maker/cook 自学成材的乐师／家具制作者／厨师
Most of these artists are self-taught. 这些艺术家绝大部分是自学成材的。