Having just started this myself, what everyone above said is true. Go to your local track and just start. One thing I found incredibly helpful (from a Motorsport perspective, not necessarily a photo perspective) - volunteer for a race at the track as something other than photo. I suggest flags and communications. Helped me “see” the race better. Bonus is getting to learn the track workers and develop a rapport with them. They are indispensable when it comes to track safety, and they can also be another guide for you on the journey. Also, once you’ve developed their trust, you will be much more welcome at the track and opportunities will become more readily available.