As long as you're making an effort, that's really what matters. Nobody's going to be offended by a small mistake or slip-up. Just apologize and move on.

Trans people are people after all, and all they want is to be treated as such. They don't want preferential treatment, just to be treated like everyone else.

If you're an introvert, then you probably don't want to attract attention to yourself in most cases. Same thing here.