Scroll down to the very bottom of the text box, and look on the left. Is there a check box with a line that says "Automatically convert carriage returns to HTML line breaks"? If so, check that--that makes your paragraphs. On the bottom right, if you click "preview post", you can see if it works.
I use mainly Firefox, v 184.108.40.206. and I'm not able to start new paragraphs or list. They all are lumped into just one long paragraph. I have to use semicolon's to deliniate what should be a line break but cant figure out how to do that. I'm computer challenged(lol) but there must be a way. Any suggestions, anyone? Thanks