Gonratulations!
All I can say now (cause I'm hurry to going to sportsbar right now... England vs Algeria!) is, chill out pal. Take your time to get familiar with the iRacings Sporting Code and services structure and such. After you think youre getting all that, choose Solstice and start practising in Open Practice -sessions. Dont even think about getting into race before you can easily do like twenty laps without troubles... and with others, even better. Every race counts, so take care about your stats, and respect others stats too. When you can move to Spec Racer, I highly recommend to do that. It's great car for epic races, and teaches you to drive 'right' way if you want to be fast in iRacing. (throttlebraking)
...and just to remind, dont even think about getting into race before you can easily do like twenty laps without troubles... and with others, even better.
Hope to see you there!