As a non-Oxford student, you will also need to get an OUS Member ID to join the club. Here are instructions from Oxford Sportsfed on how to do this:
Make an account here: https://oxforduniversity.leisurecloud.net/joinathome/MemberRegistration.aspx?refresh=638619613744848821
Follow the instructions to sign up as a new member. There is an option to sign up for 'Pay as You Go', which is the quickest way to create a free account and get a Member ID without having to consider paid sports centre memberships.
The email confirmation sent after successful registration should provide the new OU Sport Member ID. If not, the Member ID is viewable once signed into the portal via the link above or signed into the OU Sport app which is downloadable from the device's App Store.
At any time, a member may click the above link again and this time choose 'yes I have an email address and password' and then 'forgotten password' to receive an email with the OU Sport Member ID.
Feel free to write to our Secretary with any questions!