I second that! For lack of Kanji, you can always pick a book with full furigana, but for lack of grammar, that’s a much greater struggle.
Have you checked out the book clubs? There are clubs for each level, and people discuss the books and answer each other’s questions. Often they also build a vocab sheet to ease looking up stuff. If you are interested in reading a book that has already been read, you can still use the old threads and even ask more questions, there are still some people around to answer them.
This is the list of all book clubs so far:
The Absolute Beginner Book Club will soon start a nice book of biographies of famous people, maybe that would be something for you? It’s written for second-grade schoolchildren and looks quite manageable.