I only sort of agree with
@The Bear78 about the benefits of a used pro level DSLR being very, very capable (when paired with the right glass) BUT my major reservation is that they tend to be quite bulky and heavy in comparison to modern mirrorless cameras. I've got both a Nikon D6 and D850 in a bag in a cupboard somewhere along with a few lenses but haven't touched any of it in years as I just got tired of hauling the stuff around, especially when I wasn’t being paid to do it (but you could use either to bash in nails and they would still carry on working).
My solution was to buy a small and very pocketable compact (a Sony RX 100 Vii) and I used it for quite a while before realising that I really missed using a 'proper' camera.
In the end, I ummed and aahed for a while before taking the plunge and buying a Canon EOS R7 along with an 18-45, 18-150 and 100-400 lenses and haven't looked back. In every day use, it takes as good a picture as top end full framers (unless you're looking to print to the size of a living room wall!) and the body reasonably small and very light. I also think that we sometimes forget quite how astonishingly good modern cameras and lenses can be - speaking as somebody who has been using pro level kit since the mid-1970s (IIRC with a Nikon F2AS being the first 35mm along with Hasselblad medium formats) my current Canon delivers pictures which are absolutely light years ahead in terms of picture quality but whether or not they take good photographs is another question entirely and where the human factor comes in - that's why guys like Ansel Adam and probably the rest of the f64 group are still so revered by those in the know (there's loads more examples as well).