Struggling to find job with my back issue

Been struggling to find a job since I am currently dealing with a severe lower back issue for the past 9 months. To go into more detail about my pain whenever I walk or stand for 10-15+ minutes, my lower back starts to ache so much that I am required to sit back down. Attending physio, but after my 1st session, it feels like it made my back a lot worse. Need a job ASAP as struggling financially. What kind of support is out there to find a job for people dealing with lower back pain? What kinda job can I even get? Fyi, I'm 24 years old and live in London.