If you study in a shop, you will definitely not get started in the early stage, so you will lack practical ability, and you can learn 20% of the theory at school.
Let you know what hand type is suitable for nails. If you are in a shop, the manicurist doesn't have much time to teach you systematically.
If you want to learn makeup, I suggest that you must find a very professional and formal makeup training school to study. You must study hard before you study, and then make a comparison before you choose.
How to see the strength of teachers? If necessary, you can look at their school's works and the teacher's introduction, or you'd better go to the school to listen to the course on the spot and see how their students study in the afternoon, so that you can know the strength of the teachers in this school.