[clyde]

I'll also suggest finding an autocross school. Many, but not all clubs have them and some are better than others, but what they all do is take some of the immediate competitive pressure away and offer instruction. Most schools will have an instructor ride with you and also take you for rides as they demonstrate, explain, and instruct.

It's absolutely helpful to ride with other people, but I think having others ride with you adds more value more quickly IF they can give you more feedback.

Also record video, preferably mounted to the rear quarter glass behind driver left should or an interior mount between the seats. The object is to see what your hands and head are doing in the video. If your car has PDR, that's great and is super easy to use with minimum effort between runs, but it shows what the car is doing more than what the driver is doing.

Then, post-event, review your video and compare with others. If you can't find video from your events on youtube or facebook or whatever, ask people at the events if you can put your camera on their car.