B.Arch

According to me, you may get college, but for surety use Shiksha JEE Main College predictor tool.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Good Luck.

It will be based on the highest score. You should apply with the one having higher score. Both scores are valid. Best of luck.

Yes, your score is good enough to get top NITs. Just participate in the counselling process and you will get your favorite college.
Best of luck.

Eligibility Criteria for B.Arch, your class 12th percentage should be minimum 50% to apply and Mathematics is the mandatory subject. You must pass NATA exam also.

Hello,
Yes, if the score is more than 500, then you can apply after +2.

When your rank will be declared, then you can start your online choice filling. The form will be available on web portal of JEE Mains.

Visit this link to check B.Arch colleges based upon your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
Then visit this link for various colleges which provides you brochure:
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india. Check the link below to get a list of approved Architectural Colleges. https://www.coa.gov.in/index1.php?lang=1&level=0&linkid=25&lid=26.

Please refer to the link mentioned below for details on NATA exam, important dates, contact information, etc. You should be able to retrieve information regarding counseling dates for your institute in Andhra Pradesh. https://www.shiksha.com/b-tech/exams/nata.

First of all congratulations on securing such a good score. It would be difficult to get into MSRIT, but surely I would suggest you to try, who knows if your luck prevails. I would like to suggest you to look into BGS School of Architecture and Planning, Bangalore too.

Candidates shall be eligible for admission to the First Year of the Bachelor's Degree programme in Architecture or Planning if they have obtained at least 50% marks in aggregate with mathematics as a subject in the class 12th or qualifying examination. You should also have a good score in JEE Mains paper-2. So, you are eligible for admission.