Dear student,

You can become entrepreneur from whichever stream you want. But you have asked specifically for B .Tech and BBA or commerce background. So, i will answer specifically.

About B. Tech, it's most used and tried way , giving JEE getting into IIT/NIT starting a successful startup. Some successful example are Flipkart, ola etc.

About commerce field it's the thing you study is helping actually in your startup. It means finance, accounting etc. all this is required from the very beginning in the startup journey. Or another path is doing MBA and then starting your enterpreneurship journey. Few examples of this are Firstcry, big basket etc.

The best decision to take is what you like to learn, what thing you will not take as extra burden. Both ways are equally good.