Well, first thing you need to do is take a race school. This makes sure you know how to handle yourself on a track, understand the rules, and have some knowledge of race-day procedures and bike maintenance.
The MRA isn't doing any more this year, however you can contact Mark at Vanmar Racing for a private class (should cost you about $145 or so) or Ricky Orlando for the same.
Once you've done that, you will need to prep the bike and get it safety wired. No coolant, etc. Many experienced racers on here can help with that.
As for the race itself, pit with another racer! Most are happy to help, and it will make your day go a lot easier if you have someone to help show you the motions. I also suggest cornerworking in the meantime. You get a little bit of cash, and will learn a lot just by watching other racers in the turns.
Check out
www.mra-racing.org for other useful info.
I'm moving this to the race forum, FYI.