"doodle" something i do weekly and it most comes out of watchin people , random people and i then just distort them ,then sketch them down a cartoon and thus formin a doodle. it can also be formed after with just imagination of wat kinda of character u want it 2 be.doodles or cartoons r really simple 2 do as long as u get them on the paper ,fast and hard that is the key . this will lead 2 amazing development of characters. try this it may work out for u