I have been a Nikon user for many years. My first DSLR camera was a Nikon D80 and served me well for many years. It was only in 2015 that I had the oppurtunity to invest in a Nikon D3s that one of my friends was selling. This was the start of my exploration into bird and wildlife photography. I have been fortunate to have owned many models of Nikon DSLR cameras over the years and I can say without a doubt the best model I have owned is the Nikon D850. It is the best Nikon DSLR ever made!
Don't be afraid of investing in second hand equipment from a reliable source.
From DSLR I have now moved to the Nikon Z mirrorless camera system.
I used a Nikon Z50 to test the mirrorless system and this is an amazing small compact camera and paired with a good lens gets you some amazing results for static subjects. Being a crop sensor camera it has a good reach. I still use it today when I need to, and it's great for video.
Camera bodies are Nikon Z9 & Z50
Current Lens setup
Nikon 600mm PF f6.3
Nikon 400mm f4.5 + 1.4TC
Nikon 180-600mm f5.6-6.3
Nikon 70-200mm f2.8
Nikon 24-70mm f4
Nikon 14-30mm f4
Nikon 105mm f2.8
Benro C3770TN Carbon Fibre Tripod
Benro TTOR24 Carbon Fibre Tripod
This combination of lenses works well for nature and landscape photography.
The more you practice the luckier you will get!
(Gary Player)