It’s normal to be anxious prior to your first date, but the rule is simple. Don’t try too hard. Be present in the moment.
Then, my big no-no: sex on the first date. One, if you have sex with him on the first date, he thinks you’re like that with everyone. Secondly, sex clouds your thinking. When you have sex with someone, the date shifts focus and becomes about if the sex was great or not. Any clarity about this person being a future partner goes out the window.
And to answer your question, “Should a first date feel exciting, or just comfortable?” Being comfortable is what matters most.
Lastly, how would you know if you want to go on a second date? Well, that’s why you are on the date, ask questions that help you understand if they are someone you want to see again. Focus on “why” questions; it helps get clarity.