Should I send my resume via e-mail even if there's no "Help Wanted"?

You should really send your resume anyway. Your really good and I think you have real talent. Alot of places have positions that are not posted in the want ads. I would consider interviewing a random person because maybe that person could boost business. Maybe that person is a better fit than a person on my staff. I think the fact that you have no formal training is a real plus. You have a natural talent which in some cases is much better. If they don' t have any openings you should ask is they can let you volunteer. GOOD LUCK!