Even if it is small, I think it's worthwhile. Like you said... it's a reminder that you don't HAVE to be beholden to a social media site that only cares for you as a product to sell to advertisers.
I hope that Mastodon stays free of twitter-esque drama, ha. I haven't used the site, but I know that's one of the top destinations for people fleeing twitter.

I'm glad you've got your own site! While I think fondly on the time period where individual fandom sites were pretty much the norm, I never set up a site of my own.