I'm not on the carnivore diet myself but I do eat a lot of meat. My advice would be to keep it simple like eating the leanest beef (tenderloin, top sirloin, and flanks), pork loin and tenderloin, and chicken you can find. I do all my food shopping at local farmers markets. They ALWAYS have the best quality meats. None of that chemical garbage that they put in meats from chain food stores.
Discussion
I need to look up all the different meat you just described 🫣 yes, that is the big problem living in a big city like Berlin. There are very little local farmers.
Hopefully, some of these farmers markets are within walking distance. Here's a good meal plan if you decide to get serious about the carnivore diet.
https://carnivoresnax.com/blogs/articles/carnivore-diet-meal-plan