Mine,
Welcome. A few points to offer. First, do some research in the military transition threads that exist on this site and some others(baseops.net). You will find the answers(opinions) to your questions and many more that you haven't even thought of yet. I think the biggest consideration you need to think about is this: DO NOT join the military simply to build time for an airline gig, you won't be happy. DO join the military because you ultimately want to serve your country and become an Officer first and then a pilot. I dont think many dudes on this board who wear the uniform and wings will argue that point.
Best of luck to you.