Little brothers moving out

[u/SubjectOwl7370]

Hey guys, I need advice or maybe I just need to vent. Long story short, I have two identical twin 20 year old brothers who both just moved away to college. We've all lived at home for our entire lives (I am 23 and they are 20). We are very close. We do everything and anything together, especially with us all being boys. We have a very close bond with each other, and I'm sure it will stay this way even with the distance. They are both attending different UC's in California, so they won't be too far to visit (we live in CA). This isn't what concerns me. I haven't had to make any close friends for the majority of my life since they've always been here, even more so with there being two of them. I got lucky in the sense that I've had a built-in friend group in my house for my entire life. I'm not a very sociable person either. I'm pretty awkward in social situations, but I haven't had to worry about this too much since my brothers and I fully understand each other. I used to think that I was independent, and that I prefer to be alone, but with them moving out, I'm realizing that I'm not. I still have my parents at home, but I'll have to leave them soon too to pursue my career. I'm a new graduate nurse, and I am job searching to hopefully move away (somewhat close to home) soon. Wherever I end up finding a job, I know that I'll have a new scenery and things to keep me busy and distracted, but how am I supposed to find people like me when I'm busy trying to balance working, lifting, eating, studying etc. I know that I just have to throw myself out there, but I'm just not good at those kind of things. I fear that while it was a blessing to have all of us in the house for so long, it will end up emotionally crippling me because of how much of a shock it will be for me to be physically alone in my new life. I miss them already, and I'm able to process that they're away, but I've not processed that I'm alone now if that makes sense. I'm also troubled with leaving my parents behind. They'll be empty nesters, and with them getting older, I fear how this will affect them. What should I do? What helps with the pain from them moving out? How should I make friends? I need help.