You can Google running programs. I'm not being snide with that recommendation, I just don't know enough to provide trusted advice. But, from the little I do know, I think that in addition to increasing your stamina by running more than a mile regularly, you may want to mix in sprints to increase your speed. You should be able to knock some time off in a month. Did you max out push ups and curl ups?
As for your question on stats, did you see the post last night that the 4-year winners averaged a 1399 and a 3.81 GPA? We don't know 3-year awardees stats. But to reinforce the fact that you can't just go by these stats, my son received a 4-year with a 30 ACT and a 3.7 - below average on both. But he obviously fared well enough in the other categories to bring his point total up. Work to improve what you can, and like so many others have said, have a Plan B and C.