Dear Adnan

Sorry to inform you but at these ranks, you won't be able to get any core branch, neither iits through JEE ADVANCED, nor nits or iiits through JEE MAINS. Thus, i would strongly recommend you to look for other options. You should prefer private institutions if you only want to go for core branches. Search for the colleges that give admission on the basis of mains or advanced ranks. Or else, you could take a year drop and prepare well and get the branch you desire for. For now, you can check the college predictor link, I'm providing the link for the same - https://engineering.careers360.com/jee-main-college-predictor

https://engineering.careers360.com/jee-advanced-college-predictor?icn-JEE_Advanced-clgpd&ici=JEE-Advanced-article-text-mapping

I hope this helps. All the best!!