How does not going to university affect you socially in the future? In London

I’m 20f and from a middle class background in London, I’ve failed tremendously and I never imagined I wouldn’t go to a Russell group.. but I dropped out of my a levels and have never re sat them. I have few friends and no connections to see examples of the future.
I imagine I could go the the birkbeck once I’ve sorted out myself before thirty hopefully, but for now I’m not sure how in danger i am?

I’d appreciate any response. Especially if you are a professional in London, are all your friends from good universities? Did you meet them at the same university? And also could you give me a job please..🙏

Thank you