That's perfectly fine for now, in the long term, one of Marc's video poses the question to set a goal for yourself. It helps keep oneself motivated, and take steps towards reaching that goal.
Going pro and becoming able to sustain yourself from art is a worthy goal of course. A challenging one, as with any entrepenur. Not something I would personally be able to provide much advice, since that's not my personal goal or what I do, but as a fellow entrepenur I can at least say that making money out of anything (skill, service, product, etc), requires a lot of commitment, persistance and understanding of the market.
Bests of luck, one way or another, it will be fun to take on this course, I've no doubt you'll come out much better on the other end!