The info-graphic above (click on it to see the full view in my Ron Seybold Pinterest board) shows how you’d work through the steps to get a blog up and running. If you write anything, you need a blog. Non-fiction writers, especially you. It’s a source of content for your product/book. Fiction writers, you will need a blog for a publisher you might gain, attention to get an agent, or your self-publishing project.
Learning to write 150 words at a time, and being helpful in some way, is all it takes. By the way, the advice is “no less than one post a month. Once a week is a better minimum.” You can do 150 words a week.