Societies
There are a wide range of societies that you can participate in at Oxford, ranging from subject societies, to career oriented societies, to cultural/country specific societies, to societies with a shared interest. There are so many that you are guaranteed to find societies you enjoy. A full list can be found here. There is also the annual freshers' fair where you can explore the wide range of societies on offer.
There are also college specific societies, which you can find on the intranet or on Instagram. Some examples include mindfulness, chchlitsoc, and Mansfield Society (Christ Church Law Society).