IIIT

You will not get a seat in NIT Nagpur in CSE with 69 percentile. You may get a seat in some IIITs in some least branches( not a sure thing).
But if you are Home State student of particular NITs or IITs you may get a seat .
You will surely not get any seat in Josaa rounds . So you need to opt for CSAB special rounds so that you may get seat in some NITs or IIITs or GFTIs for some branches . CSE is not a sure thing but sometimes you will get due to luck. It depends on the number of persons who have more rank than you appearing in CSAB rounds and number of seats left in those colleges in those particular branches .
As you mentioned 195050 category rank the chances are really low , you may not get a seat . So try giving JEE again and prepare well this time .
You have three options now:
Join in some long term institutes and prepare for best JEE work hard and give your best.
Join in some engineering college and prepare for you sems and next JEE and give your best ,work hard.
Join in some engineering college and work for you sems .

You cannot get admission in CSE in any of the NITs or IIITs ,but it's also based on your category. For open category there are no chances to get into NITs or IIITs. If you are SC or ST category you may get a seat.
Especially by Josaa you will surely not get a seat , sometimes you may get a seat through CSAB special rounds .
You may get seat in least branches.But if you are Home State student of particular NITs or IIITs or GFTIs you may get a seat .
You will surely not get any seat in Josaa rounds . So you need to opt for CSAB special rounds so that you may get seat in some NITs or IIITs or GFTIs for some branches . CSE is not a sure thing but sometimes you will get due to luck. It depends on the number of persons who have more rank than you appearing in CSAB rounds and number of seats left in those colleges in those particular branches .You'll have 3 options now:
Settle for some other engineering college and go ahead with its curriculum.
Settle for some other college and work for both your sem and next JEE prepration.
Join in some long term institutes and prepare well this time and give next JEE.

As per your JEE Mains percentile, your rank would be somewhere around 130000, therefore it's difficult to get into NIT or IITs. But don't lose hope, now a days, there are many private colleges and universities, which offer equally good education and placements. Being LPU alumni, I would recommend LPU for the B.Tech CSE course. Engineering Programs at LPU are in the same league as BITS Pilani & many IITs. As per the world ranking, 2022 LPU has been ranked 10th amongst the top universities of India in engineering subjects. B.Tech in Computer Science Engineering is related to algorithms, computation, programming languages, programme design, computer hardware, computer software, etc. It is a comprehensive course in computer systems and applications. The students who pursue the course of Computer Science Engineering are taught about design, the implementation as well as management of computer software and hardware.
1 Placement: Every year more than 1000 companies including national and multinational companies visit LPU for placement. The highest Package Availed by Engineering (CSE) Student The highest package offered during LPU placements 2022 stood at INR 64 LPA. The highest package was grabbed by a B.Tech CSE student of LPU, and the offer was made by Google. A few of them are Microsoft, Amazon, Adobe, etc. In which are placed. The maximum package availed for CSE is 42 lacs. Per annum by Microsoft in 2020. DURING PANDEMIC THE PLACEMENT 20202021 Cloud ERA has offered 31 Lacs Per annum (CSE) DURING 20192020 CODE NATION = 31 LPA.