How do I quit wasting my youth?

I’m 21, already graduated so it’s already more difficult to meet new people and girls, on top of all that, I’m in the U.K. (if you know, you know).

I feel that I’m wasting not only my time but also being fortunate to be 6’+, slim (9% body fat, muscles are on the lower end but they’re developing), chiseled jawline (no prominent chin but definitely not receding) and so on.

I just can’t and don’t know how to put myself out there in this culture where you need to have friends who are extroverted you get you to meet their friends and the cycle moves on. I really do think that the culture here is much different, I’m not even saying this as a joke, but the lack of sun/persistence of shitty weather is probably making them more gloomy than they’re willing to admit (I’m saying ‘they’re’ because I’m not British, and I can feel that antisocial aspect leeching into me as well).

On top of that, my ice breaking skills are fairly weak when it comes to new people and I don’t know how to make conversations looser and how to be more ‘forward’ or how to escalate

Yes these could be excuses, but that doesn’t help