If you're serious, then before you move to Serbia and get your ass beaten by a random Orthodox incensed you got blind drunk on palinka with a Muslim before throwing rotten fruit at a Catholic: there are many places that'd hire you as an English teacher and you don't even need a teaching degree in a private language school. Your chances of getting hired would probably be higher outside Warsaw, but it's a stable line of work that'd open you a channel for work visa. There are also higher learning institutions opening a) new medical schools, b) degrees done in English. MPH would certainly suffice for research/teaching assistant job at many places. Maybe not ideal, but beggars can be choosers until they get a nice car or something along those lines.

EDIT/BTW: These are just my 'shots from the hip' as far as jobs go, I'm sure there's a lot more. You could probably work as an analyst in quite a few places. My, uch, 'enemy with dubious benefits' basically did your programming/modelling class for a living through EY or something like that.

Here are job application sites (I think they have English option?):

https://www.pracuj.pl/

https://www.aplikuj.pl/

https://www.olx.pl/praca/

Public institutions often don't use those and assume you'd navigate their site, so if you'd need my help, you know how to get ahold of me.