Hello! I would recommend setting a schedule personally.
Explanation:
I set a schedule. For example, I study/do work for 2 hours and I rest for 30 minutes. I would also recommend taking breaks. It's not easy to study for a long time, so resting your eyes for a couple of minutes can be very important. Hope this helps!
Your question has a very long and complicated answer. I found it much easier to type the answer out on my PC and take pics of the answer. I hope it is what you were looking for. Good luck!
