Hi Zoey,
Although you can advertise via the Share threads pinned to the top of each of the genre clubs, I'd say that the best way is just to simply get involved. Also, edit and keep improving your stories so that they really shine. If you have interesting stories, make interesting posts in the clubs, join in other peoples conversations and read other people's stories, the likelihood is that they will get interested in you.
It can be a bit of a slow burn that way but you'll make far more valuable and useful connections than by advertising, and you'll learn a lot more as a writer. The more connections you make, the more likely other people will be to find you. It can take a wee while, but I'd say that that method is far more rewarding in the long run.
Cheers, Gav