Blocking text to the right of a page’s featured image

My background is in simple HTML; I am quite new to WordPress and CSS.

My pages are set to full width, no sidebar. My pages’ featured images display to the left, which is where I’d like to keep them. The text displays to the right, but longer text then wraps beneath the featured image. As two of my pages involve lists, this looks cruddy.

I’ve poked at a few ways to get this to display more cleanly, but each time it blows the display for mobile. I end up with the featured image, a bunch of dead space, and then the text. Not good.

I can get the lists not to break apart if I float the featured image to the right. It solves the problem, but I do not like the way it looks. I’d like a left-to-right visual hit.