Hey aspirant

Hope your preparation is going well. If you want to manage the time you first have to prepare yourself completely with mains syllabus, that is easy and you will clear your concepts there only. Now, if you have done that properly start solving pyqs of JEE-ADVANCE (you should also solve jee mains pyqs) . You will be able to analyze the key concepts JEE-ADVANCE uses and try to solve more quality questions which involves multiple concepts. Do not solve thousands of easy questions or questions which are same type, focus on the main concepts and mixed concept questions.

Hope this helps

All the best