Can i get into oxbridge?

I do maths further maths economics chemistry a level and im not sure if i am doing enough work
i have found the transition to a levels very difficult as the subjects are very demanding and i am getting tonnes more homework than im used to and become extremely exhausted
i know a levels require a lot of work so i have tried to hit the ground running hence including homework i do about 16 hours homework/revision outside class a week whcih is about 5 hours of chem and further maths and 3 hours maths and economics a level a week but i am still finding the transition very hard...
will it become easier and am i doing enough and is the amount im doing going to pay off or is more needed and willi be able to get into oxbridge
i got 5A*s 3As at gcse

Your GCSEs are quite good and you seem to be working hard at your A Levels. You are doing about the right amount of work per week. I cannot say if you will get into Oxbridge but all I can say is make sure you make yourself look amazing with extra - curriculars so you stand out from the rest- don't forget many other people will be applying with good GCSEs and A Levels.

Someone should correct me if I'm wrong, but I was under the impression that Oxbridge don't give much of a rat's arse about extra-curriculars.

Someone should correct me if I'm wrong, but I was under the impression that Oxbridge don't give much of a rat's arse about extra-curriculars.

At interview you are likely to be asked why you are suitable for the subject you're applying to. Certainly on their own, ECs won't do much - Oxbridge is interested in outstanding academic potential. However if you can relate an EC to something that you learnt that makes you a suitable applicant to the course you're applying for, it will help to make you stand out.
e.g. If applying to medicine- it would be good to be able to say in your interview if it cropped up - I volunteered in a care home - then expand on this saying: it helped me understand how to deal with older patients etc.