Share with the class. I'm sure more than one person would benefit.
Wilco, sir
To the OP, I was the type that never took hs too seriously...I managed to graduate but not by much. I don't specifically remember my GPA but it was well below 3.0, and my SAT score wasn't much to brag about (probably should have not been hung over when I took that). Anyhow, it was a pretty competitive year (2001) for admissions for whatever reason and the University in my hometown rejected my app. It turned out that there was a great part 141 flight school also nearby through the local community college, and so I ended up there during the fall of '01.
My first flight was the day they lifted the blanket flight restrictions following the 9/11 attacks interestingly enough. While earning my private license, and later my commercial w/ IR ticket, I was also taking classes. For a number of reasons I decided that I would rather fly for the Navy, and to get where I really want to go (TPS), I needed an engineering or hard science degree. My buddy was in his first year of mechanical engineering school so he convinced me that this was the route to go, so I started taking transfer classes by the end of my first year of comm college in preparation for this.
I was in cc for a total of two years, and by the end I had accumulated a bunch of credits, including a year of calc and one of the calc based physics classes. Mind you I was never a math oriented person, but I taught myself because it was what I wanted to do (see above). I think I walked out of there with around a 3.5 cum GPA when all was said and done. My spring term of my second year was when I started talking to the NROTC unit at the school I planned to attend. They looked a little bit at my high school grades, but I had so much college under my belt already that the LT didn't really care that my hs grades had been $hit. He recommended that I apply for the scholarship, but I elected to wait and try out the program first. In hindsight, this might have been a waste of time (since I obviously stuck with it). Even so, getting into the program was no problem at all once I had been accepted into the university.
I had some exracurricular activities to add to my NROTC app, but nothing crazy. I wasn't an Eagle Scout, nor had I been a varsity football player. When it came down to it, a couple years of hard work in cc paid off, and I think spoke for itself. Don't get me wrong when I say this, as well-roundedness is definitely something that the NROTC program looks for, but to be honest the Navy and NETC has a huge hard on for good grades. It doesn't end at the gates of NROTC either, as I have seen probably a dozen folks commission in my time who were way substandard in terms of aptitude, but very book smart.
So to summarize, do well at cc, apply, and there is a damn good chance that you will get what you want. That said, if you do get accepted, it is only the beginning. You had better be ready to work your butt off when you do start the program! Let me know if you have any questions....I hope that was more than one big run on sentence!
Oh yeah, almost forgot to add that during the fall of my second year in cc I applied to ERAU Daytona and was accepted. I ended up opting to stay in state, and go to school with some of my friends, but it was an option, in spite of my hs grades. I can't speak for what the selection board standards are this year, or what it is that they are looking for, but I will say that > 3.0 cum cc GPA and a little bit of leadership experience in my past was enough to get me in the NROTC program back in 2003.
To add to this, while you are in cc, take as many calc and physics classes as you can (while keeping in mind that it is important to preserve your GPA there). This will make application for NROTC scholarship that much easier...I think this was the reason why I picked it up so quickly compared to some of my other college program classmates freshman year.