If you intend to start competitive shooting, pick up five or six good magazines, a good holster that is IDPA and USPSA legal, and a few good magazine holders. Practice dry fire and drawing and reloading on top of what you are doing now.
Plus one to what Jim said. Just make sure not to get a Serpa Holsters with a thumb lever to release your gun. Those can be dangerous when you are trying to draw your gun. I don't think anyone will let you use them in competitions.
Practice on drawing safely and reloading safely. Keep your finger outside the finger guard until you are ready to shoot. Always point the gun down range especially when you are moving and reloading.
And don't think about the competitions as a competitive events. They are more like friends getting together to shoot fun stages. The attitude is always fun and supportive at the competitions.
There are plenty of competitions in the area. One I like is the steel challenge at Peacemakers in WV. You will go through around 200 plus rounds. The day goes fast and you don't have to tape targets. It is a great way to start shooting pistol competitions.
Good luck!
Eric