You have to do graduation after schooling or diploma then after graduation you can pursue post graduation courses. There are some universities, that offers integrated courses for example, LPU offers integrated, such as BBA+MBA, BA+LLB etc which can be done after 12th.
Yes dear , in order to enroll in LPU under any post graduation progamme , you need to have graduation degree first . Without completing graduation, its not possible for taking admission in Masters stream .
Thank you .