Struggling to create a rich text section for my blog

Hi, I’m struggling to understand the rich text stuff. So, I’ve created a rich text section on my blog template. I’ve styled it, and I’m ready to connect to CMS.

When I do, it connects to the ‘Body’ (which is what I need), but when it’s connected, the styling is all wrong and not at all what I designed. Then, when I disconnect it to sort out the styling, it disappears.

I’ve definitely done something wrong here, either from the inside of the blog layout, or somewhere else. I’d love for some help, please. I’ve attached photos of the process.

Screenshot 2024-02-13 145612

Screenshot 2024-02-13 145629