I'll counsel you as I did innumerable soldiers during my career:

1. Dreaming is fine, but first DO YOUR JOB. Right now you have high school to finish, with a performance level that will assure your entry into the service. Screw up this year, kiss your enlistment goodbye.

2. Keep off the substances. You can't drink legally. Even if you're in a state with legalized marijuana, you won't fit the age requirements and the Feds don't approve. Any substance abuse will KO your career.

3. Stay on the right side of the law. Any legal difficulties will require a waiver for your enlistment, and with the RIF going on, you may not get one.

4. Get your financial house in order. Everything costs more than you expect. You earn at less than E1 for your first 4 months, then at $18378 per annum for E1 <2yr. When and if promoted E2, $20603 with a bump around a grand for E3. You'll have to pay Fed taxes, maybe state depending on where you enter service from. As others have stated above, you'll have other expenses as well.

5. A 94M requires a security clearance of at least Secret. Make sure there are no skeletons in the closet, and don't acquire any.

6. When you're doing well in AIT, come back here and we'll help you plan some trips (assuming you already have a good job in the real world lined up).