i am a jee aspirant, i want to clear jee by self study, i am 11th and my 11th standard in my school is getting over by end of december, i have just started my 11th jee studies, i need help with time management for studies of 12th board and jee also, i cant drop out

You still have quite a lot time if you stay disciplined. Since you are currently in grade 11th, focus on completing the syllabus of class 11th before your grade 12th lectures start. Avoid distractions and take help from lectures available online. Practice past year questions. Focus on building concepts first. If you study consistently and efficiently, you can easily clear JEE in the first attempt itself. Practice questions and give mock tests and revise daily. Don't rush, set achievable goals.

Most importantly have faith in yourself. You can do it very easily!