If you’re interested in manga, I recommend やがて君になる. It has full furigana, so high level knowledge of kanji isn’t necessary. Aria the Masterpiece is also a good one, and also has full furigana. It even had a book club on the forums in the past, so you can reference the chapter threads if you have questions.
If your kanji knowledge is higher than your WK level indicates (or even if it’s not) and you’re willing to read a series without much furigana, I recommend ひとりぼっちの〇〇生活. It’s fairly light on text, so even without much furigana it’s not too difficult.
Finally, there’s シャドーハウス, which is kind of in between in terms of furigana. It uses furigana a bit more than normal, but it’s far from full furigana. It also has a gorgeous full color digital version, which I highly recommend. This series also has a book club here on the forums, which is actually partway through volume 4 right now. So if you give this one a shot and enjoy it, you could even catch up and read along with everyone else!