What were you using before? I've had the Z8 for several months now, and really love it. It is especially good for wildlife. My previous camera, which I still have, was a 7ii. It's a great camera, and if I weren't into wildlife, I think I would be happy with it. It works extremely well for macro, and I just leave my 105 micro lens on it, and don't have to switch lenses and settings when I switch from birds to macro. The AF was the main issue I had with the Z7ii. It really wasn't up to scratch with moving animals. I've been impressed with how well the Z8 grabs focus using object detection. It's also a speed demon at 20 fps RAW, and up to 120 fps JPG, which is insane. The pre-release capture is awesome as well.
Moving from a DSLR to mirrorless is definitely a learning experience. Having made the switch, I would not want to go back. Learn the menus relevant to you, and set up the custom modes you will need. You can also program most any of the buttons for a wide variety of tasks. Give some thought before you set them up.
If you use the pre-release capture and take a lot of series back to back, you can overheat your CF Express card. The camera will sense it and give you a hot card notice before it gets too hot, but you won't be able to use the camera again for a few minutes until it cools. Not a big deal, just something to be aware of. If you shoot a lot of images back to back, then pull the card, you will notice it's hot. That's just the nature of the beast for these cards. The upside, is they are FAST. Which is good, because you will have some big files.
It will take some time to get used to, but I think you will be very happy with your new camera.
