Well, Ryan , now you have a great opportunity to do some research.
By all means, if Oxford "does it for you" after you've researched other schools and methods of getting a licence, then go there. What ever you do, don't blindly accept the word of the school's salesmen. This applies to any school.
Remember, they want your money.
Post degree, get a job. It will be the best thing you do. Use your qualifications for a while, this will do a few things. Further your resolve to get a flying job and when you've got said flying job, you'll know what a "normal" job is like.
Also, you'll appreciate earning an income. So, just blithely saying you'll mortgage your Mother's house will now no longer make sense and you'll understand the risk involved.
Your Mother may not fully appreciate just how tough the industry is to get into and survive. At the moment, you probably don't either. That's ok, that's what being 16 is about.