I've opened a new Category in my blog, but I can't figure out how to post within it. I'm sure it's something very simple... anyone?

Hi You'll select the category when you write the post, not write the post in the category. I think that's what you are asking

Go to Write.. create your post, then scroll down a tad and you'll see a list of your categories. Click to put a check box in the category you want your post to appear and that should do it.

Hope that helps

Yes, it does! Thank you...