It literally says on the image you sent how to do it with a digital display (besides, it’s pretty reasonable)

Older Sony mirrorless have most of what you’re looking for. I got a Sony a6000 for 350€ and it has auto iso with cap (but not auto shutter speed with cap), pretty good custom controls although I wish for more, great size, great autofocus. It does lack great low light performance, I also struggle with that, but maybe a full frame would be better for that.

You may want to try it out for cheaper and then buy lenses, and once you’re committed to the ecosystem buy a nicer more recent Sony.