Suggestions can vary widely depending on your goals with tarot, and of course people's opinions.
If you're using the RWS deck or something similar, I strongly suggest Seventy-Eight Degrees of Wisdom. The author covers both major aspects of tarot: Divination and personal development. She also compares most of the major arcana with some other popular decks, such as Crowley's Thoth deck and P. F. Case's interpretation of the common deck.
If you want a crash course via video, search YouTube for Tarot Oracle. There is a very helpful nine-video playlist on that channel, a free introductory course to tarot.
If you're using a deck other than the Rider-Waite-Smith deck, especially one not inspired by the standard 78-card system, then reliance on any literature directly related to that specific deck is probably your best bet to learn the intended interpretations and symbols within the cards.
If you look The Fool's Journey you can find a ton of videos to tell you the story of the Major Arcana, which is really helpful for memorizing the meanings. For general memorization, Quizlet has a learn feature that I love and there are tarot sets already there (it's like digital flashcards with encouraging messages). Otherwise, the sources above are great. I personally started with the Biddy Tarot website, you could check that out as well.