OK, the editing interface looks very similar to Blogger, but without the choice of templates.
Wait — but pictures have to be linked to another url — you can’t upload them. There’s a link button, but it’s grayed out.
I can pop up an html window and edit there if I know html.
There’s a preview at the bottom of the page, but it’s easier to miss than the preview button on Blogger.
I wanted that picture next to my text, not under it, and I wanted it without writing html. This worked on the first try in Blogger.