faunus
Villager
I persisted on meetup. Then created my own meetup group, it's not to difficult or expensive to do, then you can attract more targeted players. The Seattle Zweihander RPG meetup group (Seattle, WA)I’ve went to Meetup.com and posted on the area’s RPG group, asking if any were open to systems besides D&D, but got no response.
There are also discord for any game you are interested in, join a few and post about live play, or actual play on them with your details.
Be on twitch and find table top roleplaying games for the systems you are interested in. Chat with them, join their discord and ask there too.
Don't be afraid to try roll20.net games, they are a great way to game with people outside your normal zone.
Join roll20.net and ask for play opportunities there
Go to your local game shops, set up at an empty table with your books out and answer questions set up a game on the gaming board if they have them. At the table you can just design your game campaign or something.
At the game shop ask them to order the books and accessories for your game, many won't until there is interest or players playing it at their tables.
Twitter has a vibrantly and active #ttrpg and #rpg community. Talk about why you like the game you are interested in, DO NOT talk down any other game. Fair comparison is fine, please dont use general declarations as you'll get a rep that is difficult to correct.
I also talk about it with close acquaintances as a way to see if they are interested. Have a quick pitch. Use yes and language.