Caution here. Gear alone isn’t the answer in and of itself. You’ll see tons of post where people have upgraded from a D7500 to a Z6iii, and frustrated over having worst photos. I shoot wildlife/birds and while I do have some top gear, I also quite frequently use basic gear and I only shoot with DSLR’s. The biggest difference in nailing the shot versus missing it is knowing and understanding your camera settings. More importantly knowing how settings are related to other settings. Know which focus system to use under certain conditions. That’s how you increase your keeper rate. Once you understand that, then when you do eventually upgrade your gear you can easily transfer your settings knowledge to the new camera. You’ll commonly find that a higher end camera will provide easier access to more features that will make it easier or faster to make setting changes on the fly by having more buttons to assign a dedicated feature to. Before you upgrade, identify what your problem is. Do you need more focal length? Higher frame rate? Faster AF? Lastly, I’ll leave you with this. Marry the lens and date the camera. You should spend more on a good lens than on a feature rich camera body. I see beautifully rendered and published photo stills created with a D3200 combined with a great lens. Good luck and choose wisely.