Hypnotherapy has two aspects. The first is the ability to help people quickly. I can't think of anything more rewarding. The second is the business end. To be successful you have to be constantly expanding and promoting. If you want the former and can do the latter, there are people making US $100,000+.
Contact a group such as the National Guild of Hypnotists or American Board of Hypnotherapy. Remember, however, that the "weekend wonder" courses (in spite of what some people say) and video trainings alone don't give you everything you need. Nor does the 100 hour courses. Rather, it requires continuous study and dedication.
The American Board of Hypnotherapy will shortly be having a convention in Southern California. I'll be attending. The National Guild of Hypnotists will soon be having a convention in Las Vegas.