Hi Khushal,
75 percent in Diploma is a deacent score and considering your good performance in the course, I would like to recomend that you shpould appear for MHT-CET for admission to lateral colleges in the top colleges in Maharashtra. Your percentage is good and you have a fair chance of qualifying the exam.
You must also know that most of the colleges tke lateral entry candidates on the basis of different state-level entrance exams. However, here are some of the colleges that you can look for admission to B.Tech CSE:
For More colleges check: Computer Science colleges in Pune
Other entrance exams in India for Lateral Entry admission include:
Are admissions open for B.tech electrical
When the admission for m arch opens
Sir b.tech sarakari school se karne ke liye kaun sa exam dena padega
9th ke registration kab se honge