If you're that concerned, definitely be mindful of the tattoo's placement.
I know you said in your original post that you've wanted a tattoo for years, but have you wanted that design for years? I always advise a person getting their first tattoo to sit on the design for a while -- maybe 6 months to a year -- to make sure after that point and time that it's still what you want. It's a good idea especially if you're young; which Im guessing you are because you said you're finally old enough to get a tattoo at all. You're going to change SO much between the ages of 18 and 25, you can't even fathom it... what you want now, you may not want when you're 25 or 30. Tattoo removal is painful -- make sure you're completely married to this design.
With my first tattoo, I actually went in with a very carefully put together design. Something nobody else had, that one of my actor friends had helped me design. When I got into the parlor, I saw another that I absolutely HAD to have. Cliche as it may be, I got comedy/tragedy masks for all my years in the arts. I don't regret it one bit now (I got it years ago) but looking back, I know I would have regretted the one I originally wanted.
My second one I designed in high school. Not to be a tattoo, but actually for a jewelry project. The design itself held so much personal meaning to me (and connected to my Godmother who is a very large and important part of my life) I just had to have it. Nearly 10 years after designing it, I finally had it tattooed on my back. For the sentimental attachment alone, I can never regret it.
My point is, make sure it's that way for you. This is something that's going to be on your body forever.... Don't regret it.
"You're every gay man's wet dream!" ~ MA
If in Heaven you don't excel, you can always party down in hell...