Are you flying for the military? Or is it just private?

If you are doing it private, kudos to you doing that and working on your degree, while serving in the military.

When you get the hours (1,500 hours) start applying. As things stand right now, you would want to apply to the regionals. (Things may change in the next few years as the massive wave of retirements take place at the majors. If it gets so crazy that the majors start hiring a few civilians without regional/etc. experience, you will be well positioned for that opportunity.)

Clearly military experience is a strong differentiator with the majors. You will be able to get on with a major in a few years, ahead of a 23 year old who did a year as a CFI and started the same class as you with a regional.

If you are flying for the military, you likely will be able to go directly to a major.

Get your 4 year degree. Regionals don’t require it, but the majors pretty well have it as a requirement. Yes, there are exceptions, but they are exceptions.

Keep doing what you are doing, you are on the right track. You sound like one of those outstanding candidates the majors want to preferentially hire. Initiative and perseverance are big pluses.

(Realize all of this is a generalization, but if you keep your nose clean, it should happen.)