Hey Prince.

See with this score first of all u won't be able to grab a seat in the good colleges like NITs IIITs or GFTIs for pursuing ur higher studies in the field of ur interest under the btech courses. U should be going for private colleges like KIIT , LPU , MANIPAL which might give u some concession or admission on the basis of ur JEE MAINS performance. I m providing u a link for ur help.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches/amp&ved=2ahUKEwjy4639hKLiAhUF6nMBHa0HBQMQFjAJegQIAhAB&usg=AOvVaw2OXl9cMS4B7GJ9DfTIJZCg&ampcf=1

Ask if any query. Good luck