My 2c - It just doesn't sound like a good idea to me. With tournaments and stuff all going online/virtual there is no reason to do this other then to meet the other players, etc... Don't start a business that will be obsolete in 10 years.
I run my own business, have for the past 6 years, I sell jewelry online. I've seen the retail jewelry industry go down the tubes from people like myself who sell better quality jewelry for less on the internet. Margins for loose diamonds has plumetted the most since most websites have search engines where you can search all diamonds, sort them by price and compare specs between different online vendors. I still plan to open a jewelry store, but only so I can stock more merchandise and as a means to support my online business.
Don't ignore trends in your industry and think you can fight against change, try to adapt it into your business model. For example, make a website where you facilitate the ranking of gamers and arrange battles and send out awards, etc.... then you could arrange local events all over the US for gamers to get together and talk smack to eachother, bring their hardware and battle it out, etc.
Also personal credit is VERY important. Fix up your credit ASAP. Get some good credit lines on there. If you have to, get your parents to add you to their credit card accounts even if they do not give you the credit card. By being added on you gain all their payment history going back and going forward, and it will increase your scores. Once you have a decent personal credit score of around 650+ you can start getting more credit for the business. Also if you're thinking about opening a business any time in the future, go and register a corporation RIGHT NOW. Even if you don't do anything with it, open a bank account and just sit on it for a while. Let it accumulate some dust (and history). A corporation that was founded 5 years ago and still has all records up to date and is still in business with a bank account also opened up 5 yrs ago can get much better credit then a corporation that was just started last week. Your corporation will need you (or someone else) to co-sign for it to start establishing credit, so it's important that you fix your personal credit ASAP so you can build corporate credit.