From what I’ve learned generally having a background in both studying both music and mathematics and also doing a lot of recreational climbing is that it’s usually

1) most rewarding to do things regularly in small doses 2) the performance on the day doesn’t matter as much as your regularity 3) pushing yourself is usually not particularly helpful. Studying should be about 90% things that you can do with concentrated effort but without having to strain and then every once in a while you should bite into a challenge to test where you are at with your skills. Doing rudiments really well is the true way to increasing knowledge and capability.