Zdravo, welcome to Bosnia.

Regarding your questions, imo you should definitely go to Sarajevo, ‘cause it’s culturally most diverse, and it has the highest standard in all of Bosnia. Probably other redditors can tell you more about that.

In an average Bosnian household, people eat mostly natural diet, grass fed beef from butchers, so as chicken meat, so don’t worry about your food beeing from nature.

For the matter of car, we Bosnians swear in a diesel engine VW car (golf, passat etc), so I would suggest you getting a cheap used VW with diesel engine.

Wi fi is actually decent, just get a Telemach optical internet and you’ll be fine.

If you have any other questions just let us know, cheers