L’imparfait - what a minefield ! It’s not a question, but i’ve found that when it’s used to express habits or repeated actions more sense is made in the English when ‘would’ is used over ‘used to’ - which indeed you’ve noted in your lesson. This has helped me understand its use in French.

So a sentence like “Je lisais tous les jours” could be translated as “I would / used to read every day”