seek out relevant forums, communities, social media groups, and join them, be active, and share! Anywhere your blog posts will be on-topic and appreciated is where you want to be. There are hundreds, even thousands of communities and resources built around the very things you’re likely blogging about, so seek them out and get your hands dirty.
A lot of online spaces have rules against self promotion. I have not found much success by trying to promote my own writing myself.
I have to wonder what pieces of information are missing from such advice. I often feel like the monkey in some story I heard that learned the wrong word for some animal and this was reinforced by weird coincidence.
The other issue I run into is that I get the wrong kind of attention for the wrong things. This seems very resistant to being translated into anything desirable.