@bythewell - It's true, just popping on a little sticker doesn't take much, so you can do it at home.
But, I think can be particularly pretty when I get the manicurist to airbrush nail art designs on my nails.
I try to find classes where people are practicing the art, or even beauty schools so I can get it done for less. They will sometimes advertise cheap services in the newspaper or on their websites so students can practice. Often you only have to pay for the materials they use and not the work itself and they might get experimental if you encourage them, which I think is really fun.