ok so i can write decent lyrics i think but i dont know what to write for guitar when im also singing. i am planning on being a lead singer/guitar player but i just cant seem to find anything i like. playing trivium and metallica stuff is only good for certain songs and i just cant think of anything at all. what do you guys think?
Well most of the time you'll be playing rhythm, obviously. So it's a combination of rhythm, chords and the vocal melody that you'll be writing, and then the lead parts, bass, drums, keyboard, and whatever else can be constructed around it. I am not a singer myself, but if I were that's how I would approach it.
edit: you might find it easier to write all the music first, then write lyrics to fit it. it's very difficult to write music for lyrics without changing them a lot anyway!