will, realize this game is slanted towards upperclassmen. You won't find any Kevin Durants or Michael Beasleys in HD, esp. in D3. It's important to develop your freshmen, but also remember the first sentence. Against weaker teams, you can probably adjust your lineup to get your freshmen more playing time, which helps them develop vs. them just sitting on the bench.
Also, at D3, it can be quite helpful to redshirt a kid when possible. It may be a little late for you to do that (though technically you have 90 minutes to realistically give it a shot before your first real game tips off) but I'd try to do that with one of your freshmen ...either Rose or Ramsey would be my choice given your depth at guard.
Al's recommended first and second string look pretty good, but usually I try to list at least 3 if not 4 guys at each position in case an injury happens or one of them get into foul trouble. Also, you probably don't want to go beyond Getting Tired for any of your players if you can help it. As players get winded, their performance can really deteriorate. So in most cases I set my players at Fairly Fresh, though I will use GT if I have a real stud or inadequate backups for that position.
There is a lot of strategy that goes into recruiting, setting lineups, distribution, setting practice plans, etc. The best way to learn is to read the forums and do word searches on the forums for topics you're interested in. Or sitemail some veteran coaches when you need clarification or some guidance.