What is the next step for me?

I think you should definitely try to join one of the (several) bookclubs run here in the forums, the Absolute beginners book club would probably be at a challenging, yet comfortable level for you! I find that reading with a community where you can ask your questions and discuss the sotry really helps :slight_smile: Alternatively, for content, maybe watch (easier?) anime with japanese subs, or podcasts for japanese language learners.

For N5-N4 level textbooks: I went with Genki (I/II) and don’t regret it

Ps. another good resource: https://learnnatively.com , which grades books/manga/novels based on their difficulty level. It would help you find material which are easier to read.