Ok, so I have been playing for a few years, and I want to start a band. I met a guitar player the other night, and we have very similar interest and goals. I am jamming with him on Sunday. The thing is I have never really played with other people, and I'm not sure what I am supposed to do while we jam. Should I just try to play root notes with what he does? Do I just pick a key and play around with it? What is the proper "etiquette" for jamming? If it matters we will be playing death/black metal. Sorry this is so vague. Thanks!