Boards-12th

It may be difficult to get admission in IIMs with 63% in 12th. But if you work hard and get top percentile in CAT. Then you have get admission to IIMs. Because class 12th and class 10 th scores are added in final CAT scores. So you start doing hard work from now to get admission to IIMs. Prepare CAT with full strategy and strong determination. All the best.  You start hard and smart work from now .

Your theology Diploma completes two years of study may count only if universities accept it as equivalent to secondary school level. The academic entrance requirement for foreign universities usually demands twelve years of standard education equivalent to 10+2 but a Diploma might or might not qualify in place of this requirement. Universities providing admission may ignore the absence of a 12th-grade education when your Diploma gainsapproval along with your BA degree from IGNOU. For accurate assessment contact each university to which you apply and confirm credential recognition.

Yes you can.by online application?

If you are from a Science background, you can go for govt. exams like AIIMS, KCET, Jenpas UG, TS EAMCET. Also, search for nursing colleges, that have merit based admissions.

To pursue Law after 12th, you need to enroll for a 5 year integrated Law course like BA LLB, BCom LLB, or BBA LLB, and ensure that you qualify class 12 with at least 45 percent of aggregate. Other than that, you need to sit for Law exams like CLAT and gain a seat in top Law institutes in Inida. 

Yes, 12th-grade students can apply for internships, especially in fields like digital marketing, content writing, graphic design, and coding. Many companies offer internships to help students gain practical experience and build skills before higher education.

If you're looking for deemed uni, then KIMS- odisha is really good, Symbiosis pune is also good, NIS - Bangalore is also good