Dear Niranjan,

If you are clear with the goals and the career you want to pursue or study abroad then you can join the courses on the coursera. Because you can get the quality education compared to the usual schooling.

But, if you are not clear the night would recommend any foundation courses for the IIT JEE / NEET / NDA / KVPY / NTSE or any other olympiad exams. Which can help you gain adequate mental ability knowledge and can even help you in your later phase of study and preparation.

Here is the link for the article of class 9 solution https://school.careers360.com/ncert/ncert-solutions-class-9

Take the decision wisely.

All the best!!