Bro, why you so freaking out ??

This girl that you are meeting is also human.

So go and meet her like you would meet any other friend.

Be open to conversation, ask interesting questions not for the heck of it, but because you are genuinely interested in them, try and make them comfortable and cut the formality by laughing and making some jokes so that they are also at ease. Just treat them like an old friend that you are meeting after say 10-15 years.

Also note that you have to be prepared because the other person will also want to ask you questions. Be truthful honest and if you aren't comfortable answering something, then tell ki I am not comfortable answering them now.

The more you think, more complicated it becomes.