Need tips for launching.

I'd bypass the water all together, gets in the tread and runs out sitting at line. Maybe do a couple turns on the tires to clean as stated. As stated talk to track officials to learn the courtesies and track some. If it spins try rolling some before leaning into the throttle off the line. Yes the 60's times will be a little higher but it will help give you a feel for things. Don't set expectations too high for yourself or car first time out But enjoy it so you have something you can just do to enjoy the time. Biggest thing is to get comfortable with your ride and what it will do under different situations.