Look for an Ofqual regulated qualification if possible such as an NVQ. The standards are roughly the same and they are offered by both colleges of FE and private colleges these can be 1-2 years in length depending. Usually Level 2 in the first year followed by level 3 in the second. Private courses that are NVQ accredited can be done quickly and you can sometimes pick the units you do. Such as you may just want to do Waxing and Eye Treatments and none of the other stuff. But you won't get a full qualification if you do this. Just unit credits that qualify you in these areas. There are also private colleges and product training for companies that offer training to use their products specifically. Just because they have an accreditation like CPD or an IIQ license doesn't mean they're any good. Distance learning colleges can issue these types of qualification even without any practical training. It really comes down to research and what you want to achieve and do in the future and how you want to develop. For example, lots of people just want to do Permanent makeup so they just do that course. This can also open up entry to other similar courses. But if you want to do dermal fillers you will need a minimum of a level 3 in beauty for most providers. Some people just want to make a career out of nails so they do Manicure. Pedicure and Artificial Nail Structures and maybe, later on, do foot care for example. Just bear in mind that course providers in most cases just want your money! Ask around about courses see what other people say about them before committing and don't be afraid to ask questions! If they don't answer them move along. A couple of years ago we had to deal with the fall out of a course provider that came out of nowhere and took the UK by storm. We helped the students that were left behind and mopped up all the damage they did. Now they have moved onto the USA. We helped trading standards, MHRA, and the advertising standards agency kick them out of the UK. A good place to start is your local college because at least you will be gteed a NVQ qualification. There are currently no legal requiremenst even to have a qualification, but these are the best places to start as they teach business and management as well.
Hope this helps
Nicky xx