I'm mostly a vegetarian with the addition of fish
Poland is not a vegetarian's paradise - options/variety is quite limited by comparison to the West, but I suppose you know that already. In general, Poles don't really care about balanced and healthy eating - as evidenced by the plague of overweight/obese children and teens in recent years - one of the worst in EU...;-(
Ideally I would like to run a small business as opposed to working for a company.
If I had any chance of securing some work remotely, which is not uncommon in IT, I would arrange that prior to leaving. This way you will be less exposed to pressure until your business catches on and start generating a liveable income...