Have you tried making audio vocabulary cards, with the audio of the vocabulary word (such as from Forvo) on the front, and the word written out with kanji+furigana and English counterpart on the back?
By the way, we’ve read through volume one of the Takagi-san manga in the Absolute Beginner Book Club, and are currently up to volume 5 in an offshoot club. If you’re any bit interested in trying out the manga alongside watching the anime, feel free to stop by!