Is it normal i have never met a gender non-binary person?
At least that I know of. You hear about it constantly on the internet, but I just realized I haven't even met one person in real life who told me they identify as anything other than man or woman (most simply do not say anything about it). I have met one trans person who identifies as male, and it also was the only time I was genuinely confused about their gender (not instinctively perceive them as either male or female), before their transtition.