Always scroll down and look at the preview before you post to see if it works, if not.. then you have an unnecessary space or you forgot a bracket or parentheses.

You can use an asterisk * on either side of the word to make it italicized or double ** to make it bold
You can google a lot of html hacks for formatting to make your blog stand out.
Double spacing seems to be a thing for a lot of blogs. It’s easier to read.