Does blogging help improve my learning?

I agree on this point. I think creating a blog post does help your learning.
As people could give you feedback of what you have done.

If you do not recognise your own mistakes, you can get other people
in your class to proofread it. And if they miss some of your own
mistakes. You could get feedback by posting it on your blog. Then the
person that comments on your work you have posted, they could
give you feedback on what to fix or what to add.

Then you can fix up your mistakes afterwards, as you are improving
your work by other people's opinions. They can give you nice comments
about your work, as you would feel proud about what you have done. I
still strongly agree.