I am starting 11th and need help

Boards will soon end on 18 March, and i want to start my prep for jee asap after that. I consider myself pretty good in both science and math. (80 and 78 in pre boards not flexing just for my introduction)

After seeing all these posts by 11th and 12th grader im scared that I might not be able to perform as well in these 2 years.

Can someone layout a proper roadmap about what to do and what teachers to study from online? Should I even start early? I am so confused right now please help