Hi I have just done this , like u I worked in beauty therapy bit always loved it when a bride came in and I got the chance to do make up, .
Model mayhem has been a god send and a great way of networking. But u need to have a mob 4 picture s as a start and not just u takin a pic on ur camera phone if u know what Mean.
I got a my starting pics by advertising on gumtree and just explaining ur situation. And getting a photographer, model all working for free for a copy of the photo . Yes they are not the best , but it got my profile accepted and I have now done some fab shoots and got a few great pictures and starting to build my portfolio.
I have also enrolled in a course in fashion and photographic makeup at a local college . As I only had a basic knowledge and this has given me knowledge in face/ eye shapes and colours and how to compliment them.
One thing I will say is that it's a very, very competitive Market but if ur like me and just love all things makeup then it's worth the effort .