Greg,
You already have a head start on most of the folks you will meet in Basic Training and Tech School: maturity.
Start with the end in mind - have a goal of finishing no matter what they throw at you.
LISTEN to instructions. Lots of seemingly stupid rules to teach attention to detail (fold underwear just so, etc).
These rules will be more significant when you are working in whatever career field you get into.
Remember, even if you don't get your first choice, there are options for cross-training later.
As you can see by the responses and the Wire/Cable community here, we hope you get in.
Look through the other forums for stories or wait and post your own in 6 months.
Welcome to the Air Force.