I'd like to try and make a GBA game/rom, if not a close to feeling one and would like to learn how to make music for said game. Ive done some looking around and cant find many free/piratable software that allows me to create GBA music. The only thing i've been able to track down is a thing called MusicTechProPerformerFreeVersion.gba, that seems to be a sound test thing, but not really capable of me putting a song together unless i'm missing something. Theres no tutorials for it on youtube that i can find anyways.

Im pretty new to making music, ive mostly worked with synthesizer v and music notation programs like muse score, so if theres something Im missing please let me know.