top 10 NITs should be excluded.

CSE is bracnh wherein you need to get very high percentile. with a rank of around 30k it seems tough to get in top NITs with CSE.

it also depends on your state quota and the category you belong to.

To get top NITs you need to secure a rank under 8000. As you got 97.26 percentile in jee main January 2020, your expected rank would be around 23,810. Now if the number of candidates in April session increases upto 12,00,000, then your expected rank would be around 32k.
At this rank it will be difficult to get CSE in any of the top NITs. Now this is previous years' data and cutoffs change every year. You can use our Jee Main college predictor-

See previous yeat cutoff here-
http://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches

Now jee main april session is almost near. Prepare with our jee main knock out series-
http://learn.careers360.com/knockout-jee-main-april/