As others have mentioned, as long as you can safely handle a firearm and are aware of muzzle direction and trigger finger placement (keep your finger far away the trigger when sights are not on target), pick an event and plan to shoot it. There will be a new shooters orientation prior to the match where they will explain the rules and safety info. Also, let your safety officer know you are a new shooter. They are typically very helpful and will provide suggestions during the match.
For your first event, go slow, be safe, and get the required hits on every target. Don’t worry about time, it will come with experience. There are a lot of good shooters out there, but everyone has to start somewhere. Matches are a blast!
ETA: steel is a great measure of your fundamentals. I feel USPSA/IPSC hides this as you are typically shooting paper. Steel provides immediate feedback so you can tell if you got a hit or not.
Feedback from shooting should be coming from shot calling. If the ring of the steel is your feedback to move on to the next target you are never going to be in the hunt.