Hello Aspirant, If you got 81.08 percentile in JEE Main then your rank after JEE Main April will be close to 2 lakhs. With this rank you can't get admission in Government College but you can try for private colleges like

SRM Institute of Science and Technology, Chennai

Lovely professional University, Phagwara

Dr Vishwanath Karad MIT World peace University, Pune

Amity School of Engineering, Coimbatore

Heritage Institute of technology, Kolkata

Chandigarh University, Chandigarh

Manipal University, Jaipur

Nirma University, Ahmedabad