For engineering, people say CSE is the best option, and it is true. If you are getting CSE in one of the colleges, go for it. You don't need to worry that you have 0 knowledge of computers. You can learn side by side; all you need is the will to do the extra work. Also, in most of the colleges, during the first year, they teach the basics of CSE in first, you are supposed to learn something from each Btech course, so start from there. Although I suggest, you take a class and start learning from now only as this can help you in the second year.