There are a lot of running resources on the web that you can find. What is the ultimate distance you are trying to cover?
As a former marathon runner I would agree with
@Iwutke you aren't running enough. Meaning on your feet running. You need to be incorporating intervals and hills (even if its a thread mill) for speed. Track work is underrated in my opinion for newcomers.
If you're not a big runner now it will be harder without some training to run longer and faster. When I first started I was dying at a 11 min mile. I got down to 6:20. This was strictly by running a flat path from my near my house out and back. It's 500 meters. On my interval days I would run this for 3-4 miles.
I know nothing about AFROTC other than they're called detachments. But AF has always been weird. ;-) I am sure this will not be your last time running and why not build a solid base.
"Find the school track 1 day per week. Our workout this week is 2 laps easy jogging warmup. Then 1 lap hard, followed by 1 minute walking or jogging (I usually walk). Repeat this 16 times. Finish with 2 laps easy-peasy cool down. Total is about 5 miles. The key is finding a hard pace that you can keep repeating 16 times. The pace will seem moderate on #1, and difficult on #16. You said your goal is a 7:30 mile (about 1:50 per lap), so start there."
Adding to his advice. If you have a garmin or Apple watch don't fall in love with it. Run without music and a watch on these track workouts. Listen to your body. If you go 100% first few laps you will up the HR to fast and it will leave you with a certain feeling of ugh. One of the reasons if you ever go to a race you will see runners jogging beforehand. They're just "getting the blood flowing"
But seriously train with a purpose. My last Marathon was Marine Corp Marathon in 2013. I just kept training the whole winter and into the next spring at the same pace. I am kinda of crazy I guess. I ran the Cherry Blossom 10 miler the following April with Marathon training. The last 8 miles I was basically sprinting. Probably would have sprinted the whole race but its crowded going into Virginia.
Trust me I am no success story, but bottom line don't look at doing just what is required.
Just my 2 cents.