Chicken is cheap, good, and easy to portion. Turkey "extra parts" like wings, legs, and necks are pretty cheap too. Beef is good, as is fish if your dog will eat it. When you start raw, you should pick one protein source and stick with it for at least a week before adding anything new, so that if your dog is allergic to anything you know what is causing it.
Portioning should be done according to weight. I'm going to assume your pup weighs 40-ish pounds for the sake of this.
You could feed a good sized chicken leg quarter for a boney meal
Or you could feed a couple of turkey necks and a hunk of beef.
I started my girl (55 pounds) on raw the week of her first birthday. Chicken is by far the easiest to start with. I fed her 2 big leg quarters, but that was far too much for her and she began gaining weight, so I had to adjust.
She now gets 1 leg quarter, and another thigh or leg.
Organ meats are very important. Kidneys and liver are great sources of organs. Heart and gizzards count as MEAT, not organs.
If you can get whole chickens from a butcher, that's even better. We buy ours from a nearby far. They cut off the heads, and we do the rest. My girl is very partial to the lungs.
Tripe is good as well, make sure it's green tripe. It's stinky, but so good for them!
You can get just about any meat for them. Some advise against feeding pork, but Keira loves pork neck bones, and has had no trouble with them.
Your portions should average by the week as 80 percent meat, 10 percent bone, and 10 percent organs. It's sometimes hard at first to get it just right, but once you get the hang of it, it's very simple.
Hopefully, some others that have been in this longer than I have will chime in, lol!