You're welcome :) As for your other questions, I don't live in Bydgoszcz so I can't really say, but:
1. Nice locations to live in with a lot of English speaking foreigners or just really nice neighborhoods.
I doubt there are areas in the city with a lot of English speaking foreigners (but, as I wrote, I don't live there).
2. Which are the best Polish language learning schools? I intend to be enrolled in one of them to learn the language.
I don't know which are the best, but that's what I've found by googling:
bellcorporate.pl
en.kpsw.edu.pl/en/school-of-polish-language-and-culture/
5. Are there English speaking Catholic churches in Bydgoszcz where the mass is said in English?
I doubt there are, tbh.
I doubt there are, tbh.
But you could check out this church and ask: diecezja.byd.pl/index.php/spis-parafii/141
At some point they were conducting masses in different languages, also in English (but that was in 2005, I don't know if they still do that).