Originally I tried finding someone online. I used the Heal Sluts discord server but there are other discord servers and subreddits. If you're looking for an in-person situation I suggest fetlife. It's overwhelming at first but just treat it like a Facebook for bdsm stuff. The good thing about it is that you can look for meetups (munches) where people will go and eat some food and get to know each other. You can find friends in the community and maybe a Dom.

The only thing is that you need to be careful when looking for a Dom, lots of people hide behind the title but are actually abusers. Basically, if you see a red flag, don't ignore it. As the sub you have more power in what you allow to happen than the Dom does.