Your doing a nice job as is. So my suggestion is to keep drawing, and draw to
please your eye. You will gain a following of those who like your style.
I would say others will let you know when you ready for commissions. When
your art is liked well enough people will ask you. I rarely ever commission anyone
to do a drawing for me, so I am not a good judge on that.
A character.. Heh.. Rabbits rabbits rabbits.
Just keep drawing a variety of characters. That's the best way
to gain experience. Keep up the good work.