I don't even have my PPL yet, so I wouldn't be able to go and do the module.
You may not believe this but you have plenty of time.
Research the two options, go and visit some flying schools (not just Oxford) with a parent, have a trial lesson and if you decide that modular is the better route, you have loads of time to get your PPL. Save, work, get A levels, more work and PPL by the time you're 18 or 19.
Of course we all understand the dream but that should not prevent you from researching the career, looking at the options and making rational decisions, not setting your heart on the first thing you see.
Cheers
Whirls