Hey, Sailor Mars!
I think it's also like the disconnect between real life and online. Like you may hear of things existing, but it changes your perspective once you actually physically encounter them, y'know?
Honestly, I have no idea how I'd react if I met a trans person in real life right now. I've probably seen plenty and just didn't know it. I feel like I would look up to them, too. Especially if they are further(or fully) transitioned than I am. Paying it forward, respecting seniority, etc.
Your story reminded me how when I was younger, on an online game, a gay youth looked up to me, because I pretended to be gay. At the time, it really just seemed like I wasn't much of a manly man and therefore must have been gay. I really didn't know how to feel at the time, either, but if I helped them that's all that matters, right?
But don't sweat being an inspiration to someone else(even in the smallest sense), that's something to take pride in! Oftentimes, the simplest and smallest gestures can have the biggest impact on someone's life. So, keep spreading positivity, I say!