Honestly, I've found self-promotion to be one of the least effective ways to get my story out there. It probably doesn't help that I write fiction but I only read non-fiction. I'm a little antisocial as well and that is something I'm trying to work on. Funny enough, I find that talking to people one-on-one, individually, in a private conversation has been my most effective way to get my story out there.
But I've invested more than half my life into this little thing called Uniques United, which I want to turn into an animated show in the future. I just started writing the actual episodes as of joining this site.
I joined Tapas.io in January 2019, so I'm still very new, and here's the series I'm working on (in story form at least)