Wow, how exciting! First of all DO NOT GO TO CLAIRE'S. I'm sure plenty of people have had theirs done there and they've been fine, but you would be better off going to a proper salon.
I had mine done at a Piercing and Tattoo parlour. They are clean and the people there will be very well trained and will be experienced. Also, a proper parlour will pierce your ears with a needle - which sounds terrifying but I found it hurt a lot less than a gun, and it's safer.
Ask if they have Titanium jewellery, this is very unreactive so it won't cause any problems in your aftercare. If not, gold is good as well. Make sure you clean your piercing with the stuff they give you. You can also make up a salt water solution if you run out (1 part salt 2-3 parts water if I remember right).
Seriously, just go for it! It hurts for a bit and you might get annoyed that you can't change your studs for a while, but I've had my first set of lobe piercings for two years and I love being able to change my look by adding a different pair of earrings (warning, it will definitely drain your wallet

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I hope this was useful, good luck!!