First of all congratulations for completing your diploma
The information you have provided is a bit less but still i will put light on matter
After completing your diploma in engineering you have the option to pursue B.tech through Lateral Entry Procedure. Here you are allowed to sit Directly in 2nd yearvor 3rd semester of B.tech and dont have to study applied subjects
You straightway study you core branch subject so its easy as well as fruitful to you
Lots of colleges take admissions through lateral entry process so it is easy to get admission if you have completed your diploma without any backlocks