Hello aspirant

With 70 percentile your expected all India rank will be around 260703.

2019 cut off of Jee main was 89+ percentile it means this year you will need to score 90+ percentile to qualify Jee main.

So it will be  difficult for you to take admission in government colleges.

But you will get admission to Engineering course in private colleges.

Fir college prediction following link will help you

https://engineering.careers360.com/jee-main-college-predictor