Building up your CV can be hard without any previous formal work experience. To begin proving your skills and gaining new ones, you can apply to volunteer opportunities. These opportunities show employers that you have gained meaningful experience and that you are a well rounded individual who upholds charitable values and enjoys giving back to your community.
The London Assembly runs a website called Simply Volunteer London which is a directory of a large amount of volunteering opportunities all over the city. These cover a large range of career sectors from medical, social media, teaching, community outreach, corporate, sport, environmental, and more!