Easy customizable kanji writing flashcard app?

This might be too narrow for something to exist like this but I figured I should ask just in case. I have aphantasia so learning to write kanji (even simple ones) has been so difficult that I gave up years ago and just focused on reading. This worked fine until now, when I am studying at a senmon gakko and realizing that part of our exam is labeling diagrams. These are technical terms (like 裄、袖幅、or 衣紋) so basically no prebuilt decks/curriculums exist and I have been studying this topic for years so already know the meanings/readings, I mostly need something to help me practice writing to develop some amount of muscle memory since I can't just picture the kanji in my head.

Ideally I need something where decks can be made quickly because I already have to spend several hours a night taking notes and preparing notes for future lessons (because we have to turn them in). I already know that adding additional hours just to curate specialty decks would be untenable.

Anyone know of something that can help me?

by Moist-Hornet-3934