NIT

It is very hard to get NIT even in eastern part NIT.

Maybe, you can get in eastern side NITs. Apply for those nits, some chances are there.

You have to do the choice fill-up at JOSAA website after registering with JOSAA. You can put as much college as you want according to your preference. Then after that cutoff will come and according to your rank, you will get the colleges. But make sure that you can't change the preference order after the cutoff or 1st round. After getting college, you have to visit the near NIT for getting enrolled in that college.

Hello, I hope you are doing well. You can check the list of colleges including NITs and IIITs that you can get according to your marks and rank here. Use Shiksha JEE college predictor:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7489993.

Hello, Hope you are doing well. As you said you have 69000 rank in JEE Mains so you can definitely get any government college with this marks but there will be problem in getting NIT because it requires more number and good rank. 69K is also a good rank but not for NIT only for government. All The Best.

Hello, Hope you are doing well. Sorry you will not be able to get the NIT with the marks 53 only because it's too less and you need almost ranks around 20K ( approximately ) which is not yours. Try to get some private college and go for councelling. All The Best.

Yes you will get admission. Choose your college wisely and the branch you may get based upon previous stats. Then fill up your choices accordingly. Upvote if it helps.

https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
You can go through this link to have an idea that what college you will get. So, go through this link.
Good luck.

Our expected category rank will be around 9900. You have less chances to get top NITs but you can get others. To check which NITs you can get based on your marks/rank you can use below college predictor
JEE Main College Predictor
You should also appear for JEE Advanced to get admission in IITs. Good Luck!

You can check it here brother:
https://googleweblight.com/i?u=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&hl=en-IN.