Chicken is the number one option if you want to do carnivore. It's very popular and it's very affordable. Make sure that you buy it in bulk; you'll save money.
Make sure you use domestic supply. They have excellent products for this purpose. Their Beligas and Pharmaqo are fantastic, with injectables and orals like winstrol.
I would look at doing some bone broth. You can make it at home. I don't really trust the supplement bone broth collagen options that they sell. I would do it yourself.
Definitely make sure you're taking your support supplements and monitor all your organ health. Otherwise you run the risk of having issues as you get older.
You are in luck as domestic supply has excellent anavar. Their beligas and pharmaqo are definitely legit. It wasn't always easy back in the day to get legitimate anavar but now it is.