I say good luck! I've got a star on my lower back that my friend designed and bought for me, for my 18th birthday. It's lovely.
I've got another tattoo over my ankle bone, which hurt a bit, but was entirely bearable pain. You'll be fine, and if it's just the outline it wont take long either. I'm not worried too much about how they'll look when I'm older; they're small and subtle and in places that hopefully I wont be flashing around when I've gone all saggy. Of course you should bear in mind that they're permanent, but that's what I like so much about them.