Hey there

You have low rank but stay tuned till spot round as seats remain empty in nits and iiits which they also want to fill. But you should necessary have some back-up because it's not sure that you will get a college in spot round.

Check JEE main counseling

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/jee-main-counselling-seat-allotment/amp&ved=2ahUKEwjAqPmo_7DjAhWBRY8KHWieDTUQFjAAegQIARAB&usg=AOvVaw1zz-ym-Wk0sgWmgeJyDfFi&ampcf=1

Good luck