Another big fan of the Fuji X-series here.
I’ve got an X-T1 (will probably get the X-T3 when it arrives), plus a handful of the f1.4 prime lenses. It’s the closest thing to a digital Nikon FE-2 that I’ve ever used.
For me, the Fuji’s offer the classic 24-35-50-90 setup that I had on my (beloved) FE-2, in a compactish form factor with a control system that’s still engraved in my memory. I don’t own the 24mm equivalent yet though, but buying any interchangeable lens camera is often about where you want to go in the future, as @karst says, it will cost lots in the long run, and the sunk costs make changing systems painful.
Most modern cameras offer outstanding picture quality and great autofocus. I would choose a system based on interface, feel, lens selection and video shooting capability (if that’s important to you).
Lens selection might be hard for you to fathom, if you’ve never used an ILC / DSLR before, I suspect my preferences are more related to what I’m used than anything else (28mm sucks though).
Feel is an interesting one, and it’s why it’s important to put your hands on a camera before purchasing.
Back in ye old days when I bought my first digital SLR the choice was between a Nikon D100 or a Canon 10D, already owning Nikon cameras and lenses the D100 was the obvious choice (also Canon sucks, ya bo!). So I went to the shop to try one out, held it in my hand, and tried to rotate the front command dial with my forefinger and nearly dropped the camera. Bought the Canon 10D instead, the D100 for all my wants just wasn’t compatible with my hand.
You also need to look though the viewfinder and make sure nothing is poking you in the wrong place, that the grip fits your hand. If you wear glasses it’s really important that you try one in person, there are plenty of cameras where you won’t be able to see the entire frame with your glasses on (shakes fist at X-Pro 2).