Hi there!
My twitter is:
https://twitter.com/teasidesketches
I'm also not the best at social media, but I'm trying to be more active and engaged with people. Trying my best, but I always try to reply to people when they talk to me. I mostly use my Twitter to post comic updates and illustrations I've done, but I also try to just chat every so often.
I don't really have any tips that haven't been mentioned yet, so all I can say is that it's great to engage with other artists and try to get yourself out there with art shares.