Volunteering can be a great way to meet people in general. There are services geared toward more social group activities like meetup. Try finding local hobby/activity communities online like on discord or Reddit or Lemmy!
I know how much we hate Reddit here but I've had great success with meeting people through local area subreddits. Many will have a monthly meetup and you can just go hang out and meet people in a low pressure environment. Then as people get to know each other smaller groups can form. Some also have Discords which can be a nice way to ease into the group before getting out there in person.
Many transfeminine people have trauma, specifically about church. I did look through your profile and you have engaged here previously in ways supportive of our community members, so I'm going to assume that you were well meaning, but I am going to remove your comment as it's an uncomfortable subject for a lot of people here.
That's fair I'm not a fan of organized religions for exactly these reasons but I included it because depending on region is a social meeting place and the right one can be accepting.
Honestly, dating apps can be really good for this. Although polyamorous, I state in my profile that I am also open to just friends and my interests. Two of my best friends I met 4 years ago via Tinder. There are plenty of folks looking for friends on them. It especially seems like that for OKC.
Edit: most of my trans friends have been on a local discord community or through people I met on it.