How does "ę" pronunciation work? I've seen that when a word ends with it, the letter sounds much more like an "e" than an "en". Is this correct?
when it's at the end it's a normal e, in olden polish then used to nasalise it, but they don't anymore :)
no, you pronounce ą as nasalised, like in, ona jest kobietą or jestem mężczyzną