My first time in public, I was staying in a hotel in another city. It was difficult to leave my room, and it took courage to get on the elevator. But I was absolutely terrified to get off the elevator into a crowded lobby. Within 10 minutes I realized that no one was paying attention to me...mostly just looking at their phones or the people they were walking with. That's when the euphoria kicked in.
Almost a year later I still have 30 seconds of self consciousness whenever I get out of the car, but I forget all about what I'm wearing once I start doing whatever it is I'm there to do. Though, I will admit that I'm more aware of myself at all times because I'm still focusing on my mannerisms, voice, the way I sit, etc.