The key to successful extensive reading is choosing a book that is "just right"—neither too easy nor too difficult. Common systems used to categorize these readers include: Graded Readers | The Extensive Reading Foundation

Many PDF readers allow you to highlight text and have it read aloud by your device. This transforms a reading exercise into a listening exercise, helping you associate the written word with its correct pronunciation.

Take a Wikipedia article on "Coffee." Rewordify it to A2 level, add images, and save as "Coffee_for_Beginners.pdf." You now have a custom graded reader.