I am a qualified Hopi Candle practitioner. You should find a CThA recognised tutor of Hopi Candle therapy to study with. I am insured by the CThA to use ONLY Biosun candles as these are of a recognised standard, I am also insured to use an Otoscope as I have been trained to use one, it is the instrument that doctors use.
There are contra-indications with candling and conditions you need to be aware of. I have heard of therapists just practicing this therapy, I do not advise without proper training and insurance.