I have several blogs. Anybody can get published now. If you have something to say, you should blog.
But the immediacy of blogging leads to lower standards for factual accuracy, grammatical accuracy and writing style.
I must admit, I do not perfect my blog posts as I do my writing. But it’s OK; people understand what a blog is (a lot of it is stream of consciousness). But DO NOT let your blogging lower the quality of your writing for publication.