John Kuykendall, of the Blue Ridge Miata Club, has put together a detailed & well-written reference article regarding all that you would want to know about getting started in autocross (to access, click the link above). This article works, regardless of whether you own & drive a Miata, or some other car (even your daily driver).
I am listing the article sections to appreciate that this IS a good read:
- What is Autocross?
- How Do I Get Started?
- What Do I Need?
- What Will Autocrossing Do to My Miata?
- How Do I Prepare My Car?
- What Can I Expect at My First Autocross Event?
- How Do I Get Better?
- What Other Types of Competition Are There for a Miata?
- What Else Do I Need to Know?
John also includes a comprehensive list of references (but some may be out of date) & a good bibliography.
I’d suggest you print this out to review & study, & then review again later. There is a bit of reading involved, but none of it is fluff. There is very good content here to get started in (or back into, like me, blush) autocrossing. Very well worth the read & highly recommended by Racing Ready !