Echoing what @collegemom3717 said - if you’re having anxiety and stress dealing with HS math, you might want to think about whether or not you would be OK trying to handle an Oxford workload. The terms are short (8 weeks) and very intense. My son is a current fresher and he is dealing with Math/CompSci problem sets & practicals OK. But according to him, his friends who are taking essay based courses like PPE or History are working like dogs.