I want to get my belly button pierced. I am 18 so i can sign for it myself. The only problem is i am afraid it will hurt

I am a big baby when it comes to pain but i REALLY want to get it done. some people say it hurts and others say it doesn't. The other thing i am worried about is infection. is there a high risk of infection when you get your belly button peirced? My last question is how long do you have too wait before you can change your belly button ring? Please Help!!