Congrats on the first step of the journey to get off the ground!

I did something similar around age 22 deciding to join the Navy to be a pilot, with no prior flight experience. At the time they had a preliminary civilian flight training program to weed out the bricks. I got 10 flights in a C-172, enough to solo in the pattern.

Tips for success, study up on any material they give you. I would go so far as memorizing anything you can about the aircraft itself, that will pay off in the long run (I didn't at the time). Be prepared for constructive criticism. That is the only way you will get better. I actually knew a fellow flight student, Marine type, get chopped because he didn't take criticism well and showed it with the wrong LtCol.

Longer term, if you still like flying, get your CFI so you can make some money while building time. Instrument add on is another plus, so that you can fly even when the weather isn't clear and a million. If the goal is the airlines, think about getting a multi-engine rating. It's a relatively cheap add-on, especially with the GI bill. Then get your MEI, for the same reasons as your CFI. Personally I've found it helps my pilot skills when assessing your students'.

Best of luck man, there's nothing quite like flying.