Is the answer ok for an interview? Any grammatical mistakes? Is it natural?

What are you going to major in?

I don't think I'm going to go to the university. If I have a chance to, I would major at computer science. I don't like this subject until I take IGCSE. I got a motivation which makes me want to study about the history of computers so I studied the history of how coding work in the past and it is amazing to see how a great deal of change has been made on coding throughout the centuries. Punch cards, Basics programming. You know.
To the extent that if I have chance to go to a university is that I don't think I would be able to get myself qualified because I failed every classes. I couldn't get accustomed to the national curriculum. I think taking IGCSE and A-level would give me more opportunities to go to a good university.