Welcome! Glad you joined. While OKC isn't as active as DFW, you have to realize it isn't as large. Dallas is 9th largest city, Fort Worth is 12th, and when combined then the DFW metroplex is 3rd behind only NYC and LA. I know there are Frag Swaps in OKC, so there has to be hobbyists local to you to support that activity (but I know countless people that drive down for our local hobby club frag swaps, too...) Look in this thread for OKC event(s):
https://www.reef2reef.com/threads/2023-swap-and-show-schedule.946661/
Have you considered starting your build thread? I found its a great place to document my tank's evolution for myself. I started tank first then joined, so I'm still finding myself going back collecting pictures & updating historically as well as current state. Once you create your first post in your thread under Forum > Member Aquariums and link it to your account, they will give you build badge (look left, under my ID)
This might help you find people local to you in OKC:
https://www.reef2reef.com/forums/local-reef-club-discussion.516/
This is a good reference book type online article I still review:
https://www.reef2reef.com/ams/the-supreme-guide-to-setting-up-a-saltwater-reef-aquarium.84/