I agree with the advice you have been given so far, what happens if someone has a bad allergic reaction, or their asthma plays up or they leave their contacts in etc etc. There is a ton of information you would not have been told, or taught how to deal with contraindications without training. What about health and safety, hygeine and all the rest. Would your "clients " be happy if they really knew that you were just "having a go?" No insurance company would cover you without a valid qualification either.
Training is really not that expensive for tanning and only takes a day at the most. I can understand that it is difficult to wait when you are excited to get started but what on earth would you do if someone decided to sue you for damage to her clothes for instance, or heaven forbid anaphylactic shock !!!
Please be careful hon, there are so many self taught people out there now making it difficult for the real professionals and customers are becoming much smarter and eager to sue for any little thing that might go wrong.
Less than £100 and one day out of your busy schedule isn't much to ask if you are truly committed to being a Tannng Professional.
It is my most favorite treatment and after nearly 20 years in the industry I can honestly say that I still love it so good luck and get yourself trained and insured.