The point is - in order to attract repeat business, you do need to know what you are doing. You can't heat up a tin of soup and start calling yourself a chef.
If you have a genuine skill, then fair enough, but anyone who is going to pay you, is going to want some benefit, and that does not happen by applying the sort of masage yoou might give to a loved one with a bit of backache.
I'd be incined to do some research - try ringing round anyone who is advertising and ask about qualifications - although most do post qualifications in their advertising literature. Check out t'internet for any courses etc. before you start - remember, the Trades Description Act is a legal document designed to stop people paying for something they don't get, and however honest and well-intnetioned you may be, the world of business does not run on best wishes. Good luck.