Welcome to the forum!!!
The most basic action shooting competition is Steel Challenge. It is by far the least daunting match a beginner can shoot. That being said lots of guys shoot their first action shooting competition at USPSA/IPSC or IDPA or even 3 gun. They are all new shooter friendly. Just start slow and be safe. The closest match to you is stuff at Ponca City Rifle & Pistol Club. They shoot both steel challenge and USPSA.
Here is the monthly match calendar.
http://www.boomersho...g-area-matches/
U should Come shoot 3 gun with us next weekend. Saturday is 3 gun OKC Gun club. Sunday is rifle/shotgun at USSA in Tulsa.
What guns are u currently planning on shooting? If you lack something several of us have more than one Of everything and would be more than willing to let you use one to get started.