What's really super incredibly important is to find a good person. They won't care how inexperienced you are, or will at least be compassionate and supportive about it. Trust your character judgement, listen to any bad feelings, intuition, or instincts you have. Don't be afraid to duck out of a situation you're uncomfortable in.
Let someone you trust know where you're going to be, maybe have an agreed upon check-in time with them, stuff like that. If they text you at an agreed upon time it can also serve as cover if you want to exit gracefully. If you want to be really careful you can even set up an app on your phone so they can see where you are.
This may sound paranoid and probably is not the advice you were looking for, but it seems a lot of trans women were never taught these lessons, and that particular learning curve can be kinda steep...And for God's sake, don't meet new people at or take them back to your house.
If you REALLY want to be paranoid you can do a background check on them :p
All that scariness aside, if you're interested in this guy then why not move up to texting? It's a bit more informal than email and can help you get a better picture of the person you're speaking to. Just be honest and open and only go as far and as fast as you're comfortable with. You'll be just fine

P.S. Stereotypically, guys are the aggressors/pursuers in our society. Enjoy this and use it to your advantage, if you like.