Any body who draws or does any artwork will do lots of sketches and keep what is called a morgue file. A morgue file is a collection of pictures one can use for reference gather magazines go online and down load photos of the critter or subject you're interested in . The critter can teach you a lot. I'm 56 and have been drawing and painting most of my life. I still even look at how to books and videos videos, you never know just what you can learn. Keep your mind and ears open for constructive critism if you find yourself getting riled step back and cool off, Take some time and sort through it and glean anything you can use and file the rest in the trash can. I learned to oil paint from a friend of thr family and I used ou kitchen as a studio. Man, the crics came out of the woodwork lol
Who knows you may find yourself portraying some one's prize pet roo.