If you want to do this as a hobby, you can find someone to walk you through the rules. If you want to do this for anything like an income, think again. You are competing with all your Bulgarian neighbours for eggs and for selling pigs and/or milk you run into a whole bunch of veterinary testing rules that will make it very expensive. And then you have to sell into the poorest country in Europe. Half the year your land will be under snow and mud, producing nothing.
I have long harboured dreams of running Mangalitsa pigs and pastured poultry but I guess I watch too many Youtube videos of permaculture farms that only work when you can sell a bird for 30 euro. And I'm an agricultural economist by profession. I must get around to buying a nice orchard and planning for a retirement of rocking up in the spring to put down half a dozen piglets and a few hundred broilers, spending the summers watching them grow and legging it to the Greek islands for the winter.
Farming is, unless you are a grain mafia, a mug's game.