I do agree with #3 (don’t used a shared deck) but it can take so much time to manually create one… I found my self reading books, highlighting sentences with new vocab, and copying them over, and it took forever.
So I decided to create a website that could do that automatically- it measures your vocabulary level, you upload a book, and it generates sentence flashcards. Fully customized for you but saving a fair bit of time.
I’d love any feedback and genuinely hope it can help some language learners! The site is called Language Learning Flashcards, https://languagelearningflashcards.com/