So in the end no easy way to do it, it seems.
You could use Anki but that’s a lot of work like @wrt7MameLZE33wlmpCAV said because it’s not only single word/meaning like it is with vocabulary, grammar points have extra rules and they change.
You also could cram, which I think I will be doing. That’s not perfect either because if you select like 4 grammar points, you will see the same thing over and over again, I’m not sure if that would be very helpful.
I wish we could add grammar points to “troubled grammar” list.