Lt Col in Air Force here.

1. Your ATC...you will deploy. Prepare your wife and her family now.
2. Boot camp will change you, but not be OMFG difficult. Just pay attention to what the TI (Air Force) says.
3. When you get out of Tech School, get ready...you have at least another year of on the job training to accomplish....then you will deploy.
4. When you get to your first base your going to want to spend all the them NOT at work with your family...PLEASE PLEASE volunteer some with your squadron. You'll be in OSS which is run by pilots/aircrew. They've have BBQs, fundraisers and such. Volunteer at least once a quarter...I was commander and those Airmen are easy to spot and generally are a cut above (of course this assumes your actually good at your job, that is first...the other stuff is just a way to seperate you from the other Airmen who sits in the dorm on the XBOX after work.
5. If you want to work ATC in civilian world, be ready to leave the Air Force after a while....there is an age limit for new controllers the FAA has to follow...sounds like your a bit older than normal so this might be a problem if you want to stay 20 and retire THEN go work civilian ATC.

Good Luck. Its worthwhile