Go to the following link:
http://www.tirerack.com/features/solo2/handbook.htm?clkd=iwm
Read the solo II info at least once to give yourself a good understanding of how these events operate. This will help reduce pressure from being new.
Start with the front tires at 37-39 psi and the rear tires at 35-37.
Knowing the course is the first challenge. As other have stated walk the course as many times as allowed try to memorize it.
Look ahead is probable the most important and hardest skill to master, but is critical for all performance (autox or road course) driving. Leaving the starting gate your eyes should be looking one turn ahead of your position. As you turn into turn 1 you should be looking at turn 2 and repeat until you exit. At the last turn you are looking at the timing slip station.
The next task is to slow before the turn so the you can be in the throttle by the apex. Most of us try to hard and brake to late, result the front pushes and time slips away.
Many events can be run in first gear but they can also be run in second gear with better times for new drivers. In first gear the weight transfer will be more difficult to control. Get into 2nd gear as soon as possible and concentrate on looking ahead and slowing down for the corners to maximize exit speed. Braking late will gain perhaps 0.1 second and good exit may gain .5 to .75 depending on the course layout.
Remember to look ahead, I know I already said that but is the most difficult and most important technique to develop.
Have fun!