The following posts/resources may be helpful:
- Joining the Absolute Beginner Book Club: Preparation and First Reading Experience Expectations
- Satori Reader Appreciation Thread: The Guide (Satori Reader is an upper beginner to intermediate paid graded reader with multiple stories. Even if you don’t use Satori Reader, I think this post/guide might be helpful.)
- Introducing Natively - Now with Movies & TV Shows, Korean, Spanish, German and More! (Natively uses user input to estimate the level of books/videos)
- Tadoku (Graded Readers)
- Yomitan (Pop-up Dictionary for quickly looking up words in a web browser while reading. The older version (not maintained) is called Yomichan. The dictionary entries can be quickly/easily saved as Anki cards with word audio.)
- Yomichan/Yomitan Setup Tutorial
- Rikaikun (Chrome)/Rikaichan (Firefox) (Another pop-up dictionary that is easier to setup than Yomichan/Yomitan but has no Anki features.)
Edit: I added some pop-up dictionaries and other details.