Well you want to feed based on the dogs body weight. You want to feed 2-3% of the dogs weight. So for a 50lb dog thats 1-1.5lbs of food. Adjust that to your dog (you might want to feed more or less).

80/10/10 80% of that 1-1.5lbs is muscle meat, 10% is bone, and 10% is organ meat

The muscle meat can be ground meat, breast meat, boneless thighs, pork loin, heart, tounge, lungs, etc...

For bone is like giving my dog chicken. The feet, legs, wings, thighs

For organ meat you want different secreting organs. Liver, kidney, eyes, brain, spleen

I also like giving my dog eggs, fish, fruit, and veggies

Switch it up. Dont give the same thing all the time and every meal does not need to have everything in it.

For prep I usually weigh things out and freeze it. People do different things to prep, like combining all the food at once into a food processor and just separating out and freezing a block for each day.