Since this is a Nikon forum, most of us lean towards Nikon equipment. Since lenses are specific to a brand, once you choose a camera brand, you tend to stick with it for economic reasons.
Beyond that, a lot depends on what type of photography you are interested in. For example, if you are interested in wildlife, you would likely prioritize faster frames per second and an autofocus that will perform well on moving subjects. A street photographer might prefer a smaller, lighter camera.
The bad news is that you probably won't know what type photography will be a good fit for you until you have spent some time with the hobby. Even after you have spent some time with it, you may find your interest takes off in a new direction.
The other issue is your pocketbook. I would love to have a Z9, and a couple of long prime lenses, but that would wipe out more of my life's savings than I am comfortable with.
Assuming you have no equipment now, the best advise I could come up with is to buy an inexpensive, perhaps used, camera and basic lens and concentrate on learning about photography and where your interests lay. After some time, you will have a much better idea of what you want.
I will say this. Right now DSLRs are slowly heading on the way out. The manufacturers have pretty much ceased development of new DSLRS and are concentrating on mirrorless. That means that used DSLRs are available more affordably. DLSR lenses can be adapted to mirrorless cameras of the same make, but not the other way around. Yes, Nikon lenses for mirrorless cameras don't use the same mount as lenses made for DSLRs. The other issue is that most new mirrorless lenses are optically superior to their DSLR counterparts. Mirrorless cameras have some great features not found on DSLRs. Having said that, DSLRs will be around for many years to come, and are quite capable of meeting your needs. I switched to mirrorless a couple years ago, and haven't looked back.
There are so many options out there it is hard to say where to put your money. The good news is that most of those options are very good equipment. I hope this helps rather than muddies the water. If you have an idea of what you think you might be interested in, and some idea of whether affordability is high on the list, it would help.
Good luck, and enjoy the ride.
