Furthermore, in Polish, every letter is pronounced and there are really NO schwa sounds (represented phonetically by a backwards-written "e") as in English or other languages
So true! Whenever I try to say the names of Polish historical figures (or current people) whose names end in "-sław", my husband ALWAYS says, "No, no no no!" Then, depending on my error, he reminds me that there's no schwa and no "sh" sound in that syllable. I can make either error with that syllable, depending on the first part of the name I'll say "suhwav" ("uh"=schwa) or "schwav". Can't get just "swav" to come out!
I'm sllllooowwwly getting better . . .