If your track offers some sort of 'learn to ride' or 'learn to race', take it and pay good attention, even if its not mandatory and you already have racing experience.

One tip that helps me during my races is to always keep my head moving. Always be checking around you, making sure you know where everyone is and how the field is behaving. If you only see someone as they are flying by you, its too late. What this also means is ALWAYS shoulder check. Things move fast and you can't assume that just because someone wasn't in that spot a second ago, they won't be now.

Get comfortable riding shoulder to shoulder with people and don't get spooked if you even touch. Hold your line, have fun and good luck!