I never installed Linux myself, only used it for a bit, so what do you have to do to not be a complete noob? This is only a half serious question, but what do you think you have to do, to be a proficient Linux user? This sounds a bit like when I got my master’s degree and did not have the feeling that I know anything or have learned valuable skills, but to someone with only a high school diploma I would look rather proficient.
Thank you, that was a really good explanation!