Hello, hope you are doing well, yes you can get government colleges with your percentile of 83, since you are of ST category you can get into what ever stream you wish to go. Just apply for counselling and get into your desired stream. To know more about the admissions through jee mains, kindly go through the link provided below to predict your rank in careers

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

I think it helps you!!!
Keep Smiling:)

Wish you good luck!:)