I already attend local tournaments for Skullgirls, Street Fighter 6, and Guilty Gear Strive. If you’re looking to improve in fighting games, you’ll never get better faster than by going to locals.
What’s your nearest major city? Work with the TOs of the most similar game’s local and make it a side bracket with a small pot bonus or something, and see who shows up. Otherwise, there are majors like Combo Breaker and, this year, East Coast Throwdown running the game as an official tournament.
The nearest local that runs Skullgirls is juicy in Orlando/Oviedo and it’s not every week. I’ve been talking to the people who run the closest local about it but there’s not much interest. Everyone just wants strive and Tekken