Hi Pima,
I'm a regional captain that went through the process recently - got hired by a C-130 unit (was an FO when hired) and am now in the process of fighting a medical disqualification. First you need to decide if you want to go active duty or Air National Guard/Air Force Reserves. If you decide on the latter, there was a similar thread some months ago where I wrote a detailed post:
http://www.airlinepilotforums.com/mi...e-reserve.html
I don't think it really matters how many hours you have as long as you can convey your passion and motivation. Obviously if you have zero hours and you're talking about how passionate you are about flying that makes no sense but that's not your case. Every unit may have different criteria they are looking for. My unit made it clear that the most important thing they were looking for is the person as a whole. That being said, I was the most experienced candidate they hired but that may just have been coincidence, I don't know. (others were CFIs or not actively flying.. I'm sure the latter would not look as competitive though.)
You're obviously young so at least you have many years to achieve this (UPT by age 30 to be exact). I, too, started the process in my last semester of college and here I am 4.5 years later I've still not even begun training.
For many people though if they stay persistent the process can be a lot shorter so don't be discouraged by my example.
Read the other thread, and please PM me if you have additional questions about where to start.