Comment by nchagnet
I agree with the general feeling from other commenters that a blog should first and foremost be an activity you do for yourself. It's a great way to organize your thoughts and truly reflect on them.
I have been trying to start my own recently (https://nchagnet.pages.dev/blog), mostly because I used to write research articles and I miss that feeling at the end of a project to wrap it up with some piece of writing you are proud of. I am still looking for my voice, but it has definitely been fun!