I'm a qualified Complementary Therapist. Reflexology, Therapeutic Massage, Indian Head Massage and Reiki.
If you have a room in your house you can use it is much easier. I have a part time job as something completely different and do occasional CT at the moment, hope to do more in the future when ds starts school.
I'm a mobile therapist as house is too small to have a treatment room in - means travelling to clients and it's hard to get away as they like to tell you all their problems.
I do voluntary work in a local hospice, which is the best thing I've ever done (apart from have ds). Meet loads of other therapists, got great advice from them. Though despite some of them being qualified for years and having so much word of mouth recommendations they don't need to advertise - none of them are rich and you will have to be prepared to work to suit clients - evenings mostly.
I did the IEB in Reflexology and the ITEC courses for massage. You have to do lots of case studies and exams, but most of the people on the course left school at 16 and hadn't studied for years and still did well.
You will also have to to an Anatomy and Physiology Course (A & P), colleges that offer ITEC CT courses will also offer this, sometimes as part of the massage/reflex course, sometimes as a separate course. When I did it is was a multiple choice exam.