Ya start with fish.
I knocked a buck down. Friend gutted, an we cleaned it. He is quicker than me.
Get the meat on ice, if it melts drain it add more ice in a few days cut it for freezer or take it to be processed. The iced way I learned takes some gamey taste out. I dont mind carving a deer, but some folks do it different. An dont cut the gut sack, it stinks.
Shoot squirrels in the yard. Clean them an throw them in a freezer (my uncle- he hunts, lives in ohio, did live in tennessee a few years, good mechanic, welder, ect)
Bigger they are the more blood the have. After my incident any blood I seen brought back things but I am back to it not bringing things up for me.
good luck with your quest it will get easier with time, practice, patients, an experience...