1) Your recruiter would have the most up-to-date information. The guidelines for this are covered by instructions which I couldn't find in a quick google search on public access websites.
2) No.
3) Ask your recruiter.
4) What do you mean by this? Joe Schmo nuke isn't going to be able to do anything for you.
5) Ask your recruiter.
6) Accept full responsibility for not putting in enough effort to succeed. Nothing about your sex, skin color, or stories about external factors affecting your performance.
Most enlisted recruiters would be doing backflips to get you into the nuke program if they could, so the answers you get to questions 1, 2, 3, and 5 are probably going to be accurate. If you doubt it, you can always try a different recruiting station to verify.