I looked over my post and realized it contained very little advice, sorry :3
But in the advice category
MAKE SURE IT'S CLEAN!! Check out all the credentials, talk to the artists, look at their portfolio's. Don't let a tattoo artist push their ideas on you, a good artist won't do that, they will offer suggestions but not totally dismantle your original idea.
THINK THINK THINK, don't jump into it, I played with the idea of getting my feather for over three years, this is a permanent commitment, it is on you FOREVER.
Don't settle for any sketch you don't like. Make sure you love it, and ask yourself, if this is on my body for the rest of my life, I wouldn't mind looking at it or knowing it's there, and I wouldn't mind other people looking at it or knowing it's there.
Think about how you can cover it up for jobs, or other related environments.
The most important thing of all is follow the instructions they give you to keep it clean, and DO NOT PICK AT IT. Picking at it will take off color, and ruin the tattoo and you'll have to have work redone on it.
I know you've probably heard it all before, but lol I just wanted to pass along what I was told