I did a course with them years ago and it was fun. I used to make a lot of my own skin products.
However, if you're looking at selling them, it becomes tricky as there is a lot of EU regulations you have to comply with. All cosmetic products that you want to sell in the EU have to be certified by a chemist and if there's any water in the product (which there will be in creams etc) they have to be challenge tested for bacterial growth.
It's a fun hobby but unless you're really serious about it, it could be a costly exercise.
Having said that, I'd still love to get my lip balms and soap certified when I get them right and maybe one day I'll go for it. But I don't think I'd go down the route of lotions/creams. But that's just me.