I'd like to draw something but im not sure what, im not that great in drawing but I would love if someone could propose me something.
How about a GM?
You don't see many of those drawing. Or try drawing your character (not very original idea, but it's what most people do).
A great artist once told me...
"Draw Anything, and everything that shows interest to you!"
Hehe, its a good answer, but sadly I can never think about an idea, because I draw music.
Depending on what music im listening, a drawing will turn entirely different, I can't draw without music too ^_^
So normally all I need is an idea then I add music to it and draw