Yes, you can definitely do that, but no school will take you as you have already crossed a certain age limit set by most schools. However, you can do your class 12th exams again from National Institute of Open Schooling (NIOS). However, it is not advised to do so as it would take really a lot of efforts as it is not a conventional path and not much people will be there to help you. But if you feel that this is the right thing to do, then go for it!

Hope I have answered your question. All the best!