[dredmorbius]

If you think life's going to become any more considerate of your sleep requirements, think again.

Use time-boxing as a scheduling mechanism. If you find you have more work to do than time to do it, start lopping off items from your to-do list, and/or identifying how you can accomplish a sufficient effort in the time available.

That is likely to be a far more useful life lesson than whatever subject it is you're studying at the moment.

You also have to learn how to schedule downtime. People cannot run 100% 24/7/365, and attempting to do this is at best very painful, and at worst, literally, suicidal.