After the Diploma Course you should go for the BTech/BE lateral entry course, through which you can get a very good scope in your career ahead. In the lateral entry program, the students are provided admission directly to the 2nd year of the BTech course. Also, what ever be your Diploma Subject, you can always switch to other field in your BTech. The top courses you can go for in BTech/BE are-

• COMPUTER SCIENCE & ENGINEERING
• INFORMATION TECHNOLOGY
• CHEMICAL ENGINEERING
• ELECTRONICS & COMMUNICATION ENGINEERING
• CIVIL ENGINEERING
• ELECTRICAL ENGINEERING
• MECHANICAL ENGINEERING

For the BTech Lateral Entry course, consider the link provided below:

https://www.careers360.com/courses/b-tech-lateral-entry

I hope this helps. Wish you a great day!