Colleges in Tamil Nadu

Hello Himanshu,
You can only get admission in PSG through state board counselling, they don't give admission based on JEE Mains score.

There are chances that you might get into one of the NIT's, maybe NIT Hamirpur or NIT Raipur. There closing rank goes sufficiently far every year to fetch you a seat. So, go ahead for the counselling. Moreover, there is always a change every year but you can try at least.

To get admission in SRM University and its other campuses you need to get a good rank in the SRMJEE examination. If you have not appeared for it, then you cannot get admission in SRM University. You need to go for management quota only.
To study better, you need to bring Interest in studies whatever

Admission in VIT or any other reputed university is purely based on their entrance exam. So, you have to clear VITEEE to get admission in VIT. For more information, you can check the college website.

It depends on your priority like package, company, etc. Both the colleges have good brand value.

RV College is the best option in this lot because of the low acceptance rate and the quality of the students.

Being a brahmin will not guarantee admission in Sastra as the admission is merit based. If you have a JEE score of above 120 you can get admitted in Sastra. Stream 2 is difficult for you.