I have been racing a 1998 Porsche Boxster (shown above) with Porsche Club of America Club Racing, though I did some racing with the National Auto Sport Association early on. My home track is the magnificent and historic Virginia International Raceway, near Danville.
This is a video from my first race, back in March 2012 at VIR.
This is a short video from my crash at the Circuit of the Americas in 2013.
You can do some laps on track and learn the ropes with a club like Chin Track Days.
Porsche Club Race at VIR, June 2018: