["At work I am the most confident man ever, maybe because I've worked there so long.", "There's nothing wrong with that. Unless you're mean", "No, I'm very friendly, it's just I wish I was that way outside of work."]
Maybe you shoud pretend you are still at work until you get the hang of it.
Every time I go to work I feel like the most confident person a live.  If only I could feel that way outside of work.