As I have searched for SRCC GBO, you are required to complete at least your graduation graduation. You must have completed your graduation from a recognised University and must have scored at least 50% marks in the aggregate if you belong to general category. But if you belong to any reserved category, then you are required to score at least 45% marks in the aggregate.

And you have only completed your diploma which is equivalent to 12th class. First you are required to complete your graduation only then you would be eligible for this program. Even At the time of final semester of your graduation you will also be eligible to apply for this program.