Good evening ,

As per your given problem , there is no need to worry if you donot have knowledge about the computer science but you want to opt as your career. If you have good marks and you want to pursue btech from computer science then go for it.

As , the faculty of the engineering programme will teach you from basics so you donot need to worry for that. As many of the students are known about the computer but they still choose computer science as a careers and after doing the hardwork they will perform very well .

So , go for it without any confusion.

I hope your doubt is clear now.

All the best !!