This , like most of my sketches started off as a scribble . Starts with a gesture then becomes a sketch and if I like that Then comes some color and some refining . This isn't done for any project . Just practice.
I dont know if I'll keep working on it. I get impatient sometimes and ant to move on .
When there is no model available then I just make them up . I always call it being lazy. ( for me)