I'm 64yo. When younger I'd suffer similar reactions. Being older I've got a different view of how is go about dating.
Ok, first date, just enjoy and seek a spark, if it's there then organise another before the end of the date.
Before the second date you'll question yourself. Thats ok, from and bare it. But during the second date you would be best to consider a few direct questions e.g.
Where do you want toy be in 5, 10, 15 years.? If he doesn't include having a family and it's on your list then you have a problem.
There is a million questions you can ask. You'll work them out. What your plan should be is to limit your anxiety between date by getting answers to questions.
I hope that helps.
Beyondblue topic the best praise you'll ever get