@malhomsi I use Twitter to post WIPs and stuff, but it’s really hard to get any attention unless you spam the hastags. I don’t care for Instagram because even though you still retain ownership over your work (previously you could not), they still have permission to use your art in any promotions in any way without crediting you. Plus you have to publish from your phone in a specific size ratio and it’s just really annoying in my opinion. Facebook also owns Instagram, so if you don’t like Facebook, I’d be hesitant to use Instagram. Might as well get the profile even if you don’t use it just so someone else doesn’t alter your online presence, if that makes sense. You could use some social media publishing tools to help with scheduling posts and stuff so you don’t have to be so plugged in all the time (Hootsuite is what I use personally, but there are others). Ultimately, up to you.
Also, publish low quality images on social media with a watermark so someone can’t steal them as easily. It’ll be more hassle to the stealer and they will be less likely to steal it. If there’s anything you really want to protect, apply for a copyright in your country. While you may technically have the copyright from the moment you make it, registering it will provide even stronger protections against infringers. Take a look into it and see.
Anyway, that’s the end of my cautionary tale. It’s up to you to do what you want.