I would really like to know if there is any real chance for me to get a life in Poland.
I know some Romanians who live here, they get on just fine.
I think the problem for you is your profession, why would a language school hire a non native speaker of the taught language, in a sea of native speakers and natives alike?
I would expect that you'd be on a very low wage to compete with the rest.
Perhaps you could try something else?
Best of luck!