Tehwabi

I've never been a breakfast person either. But I used to do the "bullet proof " coffee thing. A tablespoon of unsalted butter and a tablespoon of mct coconut oil. I found that I wasn't as hungry by lunch time.
Fat and protein take a while to digest and can make you feel more full.
Definitely find an alternative to the butter sandwich though, that's a shit ton of calories.

I used it years ago when I had a writing hobby. Whenever I go back to it, I'll probably use it again. Learning it wasn't hard for me because I'm old and it wasn't very different from the word processors I'd grown up with.