My name is usha iam studing second year pcmb cbse syllabus i want to get more that 90% in pu iam a average student and i ill work hard get m

I got 80% in sslc and i got 66% in first year science so i want to more than 90% in second year cbse syllabus .iam working hared but also i forgot soon in futur iwant be a good doctor