Hello aspirant, congratulations on performing well in JEE MAINS Examination 2019. The cut off  marks for NITs and IIITs in 2018  for your category were 53 and 54 respectively. Bsed on your performance, you can easily secure yourself a seat in NIT or IIIT  with the course of your prference. 

Good Luck.

From your marks and rank, it is evident you are qualified for JEE advanced. 

Now, coming to your colleges, owing to your SC category, you can expect some new IIIT's to get.

Some of the best new IIIT's are 

1. IIIT Trichy

2. IIIT kottayam

But don't shy yourself away from filling even the dream NIT/IIIT of your choice. As JoSAA allows you to fill as many options you can, so do take that oppertunity.

So, I would recommend you to take part in JoSAA and go to through all the round even the spot round

Thank You