How does one actually pronounce the "è" sound anyway? I just assumed it was pronounced like "eh", but most of the time is either completely silent or sounds like something else completely. In the sentence "È un libro", I can SWEAR that the speaker says "El libro". So is it "Eh un libro", "El libro", or something else?
I understand how you feel. They are not very good at pronouncing the words. Don't blame yourself, everyone hears the same thing. I just click the slow button many times until I am sure I am hearing the right thing. Another helpful thing is that if the sentence was el un libro, it would be The a book, and that makes no sence, so you must assume it is e.
"È" means "(he/she/it) is" - the pronoun is optional (and worked out from the context), only the properly conjugated verb is required in Italian (same as in Latin, Spanish, and Portuguese too IIRC). From what I understand, "it" is rarely used in Italian, so if you just see the "È" and no other context to suggest he or she, then it means "it is".
If you're typing your own answer (not using the word bank):
On a phone, hold down the "e" key and the different accent options should pop up to be selected.
On the web browser version, there should be a list of accented letters under where you type that you can click on.