AvatarLOK
He is a bender of water and fire, in addition to asking for martial arts based on elements ... Basically he has the power and training methods, what he lacks is experience. How about he wants something that simulates combat, it will not make him superpowerful and will circumvent his lack of experience in fighting against any other form of life, in addition to allowing him to fully use the martial arts he asked for, since he will have real combat experience with them.