>>4232133dont listen to all these nophoto shitters
R6 is a god damn nice camera, same sensor base as 1DXlll aka. canons $7k camera from 3 years ago
only thing you will have to do is adjust your raw picture profile or whatever canon uses (i shoot hasselblad and sony so idk) to tune down the magenta or whatever that reddish warm cast is. other than that, as far as photography goes, you basically have one of the top 5 sensors made in the past decade in your hands.
remember... dont listen to all these idiots here, all other specs dont mean shit, unless you get into big budget filmmaking but thats a completely different matter. as long as you have an amazing sensor, an amazing lens and a working shutter button, nothing else matters. youre good to go. all the other specs are irrelevant for taking award winning photos no matter the photography field.
canon has plenty of amazing glass for RF system
for nature most of the high end nature and wildlife photographers use either a wide 21/24mm or standard 50mm, along with a random telephoto of whatever they prefer, which is usually a 70-200mm, 135mm, or 500/600mm.