You have good intentions, so that’s a good starting point. I think the trick is to not overthink it to much. You don’t have to overtly prove that you are safe and supportive. And as you already realized, you don’t need to call attention to the person being trans.
I play tabletop games at a local gaming store at least once a week and there are often a half dozen or more trans people there playing games. My friends and I just talk to them the same way we would talk to anybody else in the store. That doesn’t mean we’re all exactly the same. Some of us are bubbly and extroverted, some of us are more reserved and introverted. But the key thing is: we don’t change to some other “mode” of interaction when the person we’re talking to is trans.
So if you normally casually compliment people on their fashion choices, etc, and you can do it in a nonthreatening socially smooth way, sure, I think that’s fine. But if you are being “extra” just because the person is trans, and doing some kind of role play you normally wouldn’t…don’t do it.
I hope that helps.
Anything that requires a good sense of direction / orienting / navigating. I have always been terrible at that kind of stuff. GPS was a huge life changer for me.