I would also feel really sensitive about it, I get why you’re feeling self conscious. I will say though that I’ve actually been in a position like this a few times, and tbh, people usually don’t remember or care that much when they meet you in person. They’re all also busy with preparing to go abroad, feeling nervous, wondering if people will like them, etc and they might not even fully be paying attention to you. Whenever I’ve been in this situation, we meet in person and there might be a flicker of realization that this person asked this or said this in the chat, but people are often so different in person than they are online (especially when you’re in a situation like that where everyone is on best behavior) that you quickly let go of whatever preconceived notions you have.
Just do your best to stay on top of stuff, and be gracious and apologetic when you make mistakes. Everyone else in the group is also hoping, just as much as you are, that people will like them. And if they don’t like you? Oh well. It’s a big country, you’ll meet other people.