Yes most people have to learn the hard way when their shots don’t come out great.
Personally I have a nice collection of primes, small in size and light weight and good aperture settings. My favorite for wildlife work is my 135mm prime on my canon 5d mkiii, big old school camera but it fits my hand perfectly.
Look forward to seeing more of your work.
Agree the primes are very nice. My style is more suited to the flexibility of the zooms. Even then I still need three different sizes, or at least two with the 1.4x adapters.