U have completed your diploma and if you want to start degree then you have to first go through the central counselling process of your state. In that if you want to persue degree course then you have to fill the choices in the central process and then you have to go for the further rounds of and procedures of the admission process. There are some universities which have their own entrance exams. So first you should have the clear ides that in which course you want to go for degree, that is of course related to your diploma but you have not mentiones your diploma brnch so we are in confusion a little bit. But you can definitely go for B. Tech. in your respective branch but first you make sure that where you want to go and what score you have got in your exam and entrance exam and based on that get the proper counselling. And yes there are help centers running by the central admission committees so you can go there for further details they will help you to face the difficulty.
Thank you and all the best.
Candidates can check B.Tech Cut off for Top IITs & NITs here.
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