You know, that's what this site is here for. Not the boards, or myself or Hanne, but the WHOLE site.
Asking someone to give you all the sex information you need in a few paragraphs just is asking the impossible. It simply isn't that simple to be that educated about sexuality and your body and health.
So, for starters: you should -- especially given your lack of knowledge right now -- be using a condom for oral sex right now, at the very least. Do it.
Next, take the time to read some basic articles on all of this, like these, for instance:
Female sexual anatomy: http://www.scarleteen.com/pink/pages/anatomy.html
Sexually Transmitted Disease Chart: http://www.scarleteen.com/pink/pages/stds.html
Condom How-To: http://www.scarleteen.com/pink/pages/condom.html
Sex Readiness Checklist (and yes, oral sex IS sex): http://www.scarleteen.com/pink/pages/readiness.html
Human reproduction Basics: http://www.scarleteen.com/pink/pages/pregnancy.html
Ask a Sexpert FAQ: http://www.scarleteen.com/pink/pages/ask.html
Above all else, go at the right pace. If things are moving so fast that you don't have time to assess your risks and learn what you need to about sex, it is TOO fast.