Itch isnt that great a platform to host your games and solely rely on it. I have nearly 400 plays on one of my games here and the only comment was my own. Posting to reddit or twitter usually does well for it.
Probably gamedev or indiedev subreddits, theres one for itch but its really inactive and and gets little interaction.
I'd say, don't straight up advertise your game, show a little bit of gameplay of it and talk about your experience, then post in the comment a link to the page for anyone whos interested. Game adverts tend to not do too well on their own.