Hi dear,

            You are in B.Sc first year and now if you want to migrate to B.Tech or want to get a seat in B.tech college, there are two ways for getting in B.tech.

First one is you should complete your Three years B.Sc degree program with more than 60% and you can get seat in good B.tech college through Lateral Entry. Here don't expect IIT's or NIT's. 

Second way is Dropping out of the college. If you are getting a seat in B.Tech course in very good and reputed college you can drop your B.Sc course and go to that college.

All the best