First , get out of your own way. If someone has asked you out they obviously are attracted to you enough to want to get to know you. If that works out then you start spending more time together. Ultimately If that continues to go well, intimacy will ensue. Barring any disasters there, the couple fall in love and begin thinking about a more permanent relationship.
You are worrying needlessly about things that no one knows will workout. You may not like the guy after the date, he may not like you...so what? There is no guarantee, its like trying on shoes. Do they fit well, do they feel good, and most importantly do they look good on you? The only way to know is to try on a pair or two and walk around in them. Its the same with dating. If you are attracted to men, then you are fulfilling that need by going on a date. Have fun, laugh, smile and be fun. He is feeling exactly like you are and is just as nervous and unsure. I mean you have boobs! 🤭. And they did ask you out which was a huge risk for a shy person to take, so relax and have fun with a new friend. If it becomes more then it does, if it doesn't then there is the next guy. That's how its supposed to work. Ever searching but having fun while doing so.