Hii

After completing your 10th this year, you can't jump directly on 12th Class in CBSE or State Board. You need to complete your 11th Class first & then only you can apply for 12th Class. Class 11th paves the path for 12th Class in terms of basics that you will learn in 11th. After 10th, a whole new set of chapters are presented which can only be understood in 11th Class & same chapters will appear in 12th with advacement.

I will advice you to first complete the 11th standard, after that you can join the 12th standard.

All the best.