Hi aspirant

If your rank i.e 18,980 is not a sc category rank then you have scored very well and definitely you'll get reputed NITs.

You can apply for NITs/IIITs/GFTIs of your home state .If you are not satisfied with that you can apply for other states as well .

You will have to compromise with the stream to get top NITs.

You can apply at 

NIT Raipur

VNIT Nagpur

SVNIT Surat

NIT Jamshedpur

You can check previous year cut off here:

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

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

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

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

All the best.

Heya Aspirant

See if u have scored this rank in the general category then u will surely get good colleges like NITs IIITs or GFTIs for pursuing ur higher studies in the field of ur interest under the btech courses but if u have achieved this one in SC category then u might not be able to grab a seat. U should be then opting for private Institution for ur btech career. I m providing u a link for ur help.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches/amp&ved=2ahUKEwjy4639hKLiAhUF6nMBHa0HBQMQFjAJegQIAhAB&usg=AOvVaw2OXl9cMS4B7GJ9DfTIJZCg&ampcf=1

Ask if any query. Good luck