JEE

There's no issue in being a resident of Jharkhand to get admitted into vssut, but there might be a state quota. Given your rank, it depends upon the branch preferences and real counselling to know whether you can get into vssut. There are also other courses like dual degree if you want if you don't get a seat in B.Tech.

I think you will. But given the COVID scenario there will be some irregularities in the seat matrix as the students may not prefer to get admitted to a good but distant place college this year.

No with this percentile you can't get ECE in ymca in general category .For reserved category may be you can get in physical counseling

No, You don't have chances in DTU/NSIT.

If you are a general category you cannot get admission to DTU. But as you have scored well in boards I think you should opt for a partial drop by getting admitted to any of the Delhi University colleges and prepare for the next attempt. This will help you as you'll not be too much pressurized by your parents and can focus on your goal well.