Hi Arpit.

The official cutoff of JEE Mains 2020 will be released along with the final results after the April JEE Mains. The NTA will announce category wise cutoffs then. But you can still check your estimated rank using the formula (100-your total percentile)*869010/100. So with this percentile, your estimated All India rank will be around 14500. Now, if the candidates appearing in April's JEE Mains increase, then your rank would increase too.  But still it is a fine rank and you can get some good government colleges from this.

Yes, you can get Electronics and Communications Engineering in DTU, NSUIT and IIIT Delhi. You although don't have chances of getting Computer Science Engineering.

You can also get admission into some good NITs. You can get top branch in NIT Delhi as it is your Home State. You can CSE in an lower to middle tier Outside Delhi region NIT if you want.

All the best.