So make a build. Think up something semi-original. Host a server, get your ten minutes of fame and be done and over with it. I think you'll come to find that the friends that matter are the ones that don't just play blockland, but all sorts of games with you. Hoping you have real life friends suggest the game to them. Maybe they'll play.
Also, after 16 years I had no job experience but I still got a job. Basically what I'm trying to say is, you start somewhere. You may start on some rarely visited server, but believe me, that host is grateful- most of the time -for you being there, and the odds are will recommend you in the end. For you, you chose to start your job 5 years later then others. No biggy. Just start now rather then even later. Hardly anyone knows me. But hey, don't make me sad. Once you get through it I doubt you'll be bothered by it again.