my experience with jamming was helped by having a number of percussion instruments. When I played with others, if I didn't know the song, I would play percussion. This helped my understanding of rythum and made me something besides another beginner guitar player. This led to musical friends and jamming opportunities.

I also had a serise of songs I could lead. But when others wanted to lead I could be a useful participant who added to the mix. Not another guitar player struggling to keep up with songs I didn't know.

I know you want to play guitar but, in my experience percussion was very useful in building a circle of friends to jam with