Hello

In my opinion u can get a gen rank of 10 to 15k. There is a chance to get cse in suratkal if it is your home state. But i don't think it is possible for you to get cse in other top nits. Still there are spot rounds and there is some chance for you if you are very lucky.

Hello.

It depends on your rank rather than your score if you can get into an NIT. The marks vs rank keeps changing each year along with the cutoff due to various factors like difficulty level of the exam and the average score of students etc. You could use the rank predictor to get an accurate estimate of your rank:

https://engineering.careers360.com/articles/jee-main-rank-predictor

You could then refer the cutoffs of previous years:

https://engineering.careers360.com/articles/jee-main-cutoff

Hope this helps.