Since you are completely new and want to get into making games I'd recommend you find a game engine and go on from there. If you feel like you cannot submit a full game no matter how simple or you can't find a team, It's fine if you submit a game soundtrack(no effects included).
Hey there, interested in joining a team for sound design as well. Got a few sound redesigns for game trailers and such under my belt, but have never worked with a "game engine" before as you mention, was wondering if you could help me with a few questions.
Are you talking about middleware for audio implementation like Wwise, FMod, or Unity? What chops does one need to have to be a part of a team like yours in terms of sound design? What engine is your team using and does the sound designer need to use the same one?
By game engine I am referring to an Integrated development environment or framework for compiling and making games. examples: unity, gamemaker studio, love2d, CryEngine, etc. However, this isn't necessary if you are trying to make a team for sound design.
I don't know yet if I will participate in the jam but if I am, I wasn't planning on working with a team. Sorry about that.