Hi Ivan.
I'm currently in my final year at uni, although not at Oxbridge/Russell group uni.
My uni's way down the list
Deciding to go to uni is the best decision I've made in my life to date.
I think it's fantastic that you have a chance of going up to Oxford!
My advice, FWIW, is go and enjoy your studies. While there's nothing wrong with parties/social events, make your lectures, coursework, essays and exams your main priority.
Just one question, why PPE? Are you thinking of going into politics?