Hi,

The eligibility criteria for advanced diploma varies among different fields, some have the eligibility criteria for clearing class 12th, which some require graduation or post graduation as minimum qualification. If you look at minimum eligibility criteria that is class 12th, it is preferable for you to go for a undergraduate degree and not for a diploma course. As of now, it is better to complete your 12th and focus on undergraduate courses. Also, it would be better if you mention  the diploma that you want to do which will enable us to help you better.

I hope this helped you.