The fact that so few people blog these days makes blogging even more influential than it used to be. You can establish yourself as something of a global expert on some topic just by writing about it a few times a month over the course of a year! Don't expect people to come to your blog. Practice https://indieweb.org/POSSE - Publish (on your) Own Site, Syndicate Elsewhere - post things on your blog and then tweet/toot…
It's unfortunate that POSSE is actively discouraged by platform algorithms. Posts with links get a fraction of the visibility.
Let your blog get indexed by Google and other search engines. Provide RSS and maybe even ActivityPub-integration and people WILL find it.