[Dollface]

Ok so this might seem like a weird question, but first of all i'll explain that I suffer from anxiety and because of this, I like to know exactly how things are going to go before I do something.
So, I want a tattoo but I need to know what actually happens when you enter the tattoo shop. Do you just walk up to the desk and say "Hi, I would like a tattoo please." ? I'm guessing you have to fill in some sort of form as well. Will I have to show ID? Do I just show them what tattoo I want?
Basically I just want to know every detail of what will happen when I enter the shop