Sounds like you want to mess around with a tubular lock. I wouldn't suggest it for 2 reasons.
1) Your a complete newbie, stick with schlages and masters >=)
2) Using the powers of logic, I deduct that this lock is not your's, as you are only 13 and noobish. Picking locks is fun, but it is not a game.
Anyways, you have to be pretty comfortable with your tools and experience to pick something like that. Where did you see this lock? Post a picture and you'll get more feedback from this forum. Get the brand name too if you can.
To pick this, your going to need a special tool that probably wont be falling into your lap any time soon. It's specially made for these kinds of locks and generally, is not available to anyone but smithies. Not saying you cant get one with the proper persuasian. Theres probably a website out there that caters to your specific needs. If I'm right about the lock, I'll find a URL that'll hook you up
. Be forewarned you'd have to shell out a couple hundred to get the tool I'm thinking of.
but it looks like a circle cut in the metal with aline coming out of the bottom what is this and how do i pick it 
, yar grammar kind of reminds me of Group X. I heart those arabs.
