How to become a ACMT?

I'm pretty sure this is in the wrong forum but I don't know where else to post this.

I'm 17 and currently work at JCPenney as a shoe salesman. I get minimum wage but do work off 3% commision as well. I'm going off to college and will be moving towards the end of May. I would love an IT job! I am so ready to get out of Penney's lol but they have been pretty great to me.

There is a position open at my (future) local Best Buy for a Geek Sqaud In House Technician. I know it's way early to start applying and I know I won't get the job because I won't be there for 2 and a half motnhs but at least I'll be in the system and I can apply again when I get down there.

I was looking through the expectations/requirements and I saw that any Apple Certifications are a big +. So would an ACMT fit into that? Isn't the ACMT the basic/entry level certification? How do I go about becoming certified? Can I do it online or do I have to go to a testing center? How much is it? Is it worth it? What kind of difficulty can I expect?

I'm pretty well versed in Mac hardware and software and I think I would be able to do fine but is there something I can study? I know you do have to pay and I want to be prepared and not waste however much it costs.

Help Me? lol thanks!!