It would change how much you would get each month in your retirement as you would probably have significantly more points, but wouldn't change you getting them at age 60.

PMing Mike was a joke. You'll get good advice, but it will be brutally honest.

Reserve or Active, you're going to be a military pilot, you should first figure out if that's for you.

It isn't particularly easy to get picked up as a pilot, active or reserve. It will take a lot of work on your part, which you should get moving on. Most likely, getting picked up as an off the street guy by a reserve unit would be much harder than getting an an active duty slot.

Other than that, you haven't given enough info to get usable advice. How old are you? College? Flying experience? Can you pass a military flight physical?