Hey there, James! :wavey:
I think it's great that you're doing research and planning before running out and getting a snake. This forum has a ton of information for you that will help get you on the right track. Then you'll be completely ready when your little guy does come home with you.
First, if you don't have a lot of money, you will want to save and get all the essential equipment you'll need BEFORE actually getting a snake of any kind. Your tank would be fine for a young snake, but eventually you'll want to upgrade to a minimum of a 20gal long.
You'll need a good fitting screen top with clips for the tank. Corns and basically most snakes are good at finding the smallest hole/crack/crevice and escaping through it, so you can't scrimp on making sure your snake stays save and secure in his viv.
Next comes temperature....corns need a temperature gradient with a higher temp on one side of the tank and lower temps on ther other. They need BELLY heat for digestion, so don't even bother with a basking light that you'd use for other herps. An under tank heater USED WITH a rheostat or thermostat is essential, along with a thermometer probe directly on the glass to measure the exact temperature of the tank itself, not the air temp inside the tank. Then you'll need bedding. No pine or cedar ever. Aspen bedding is used a lot, but you can also use paper towels or shredded paper. Hides, one on each side of the tank...these are easy, and can be something as simple as toilet paper or paper towel tubes....so start saving a few up for when the time comes! Add some fake plants for cover, a wide, heavy bowl of water that he can't tip over, and you're good to go! It might take you a while to save up for all of these things, along with the appropriate sized food, but once you get everything ready, you'll know that you're bringing your snake into a healthy environment.
Here's a FAQ that covers the basics
http://www.cornsnakes.com/forums/showthread.php?t=28341
and a care sheet as well:
http://www.cornsnakes.com/forums/showthread.php?t=64125&highlight=care+sheet
This will get your started, and there are some wonderful books out there as well. Check out
www.cornutopia.com for Kathy Love's book which is highly recommended. Kathy is also a member here and shares a wealth of info that us newbies can follow and easily understand.
So, sorry for the huge post. Basically, welcome and good luck!!
oh, p.s....tell the people where you're from, and there may be a corn breeder in your area.