Are you worried about how to create a unique first date that will impress your girlfriend?
(And it can be also a serious buzz kill, basing on the fortune) When it is too chilly to go out for stargazing, then you can think about a date in a museum.
Besides, I’m sure that you do not want to take your girl to a museum if she is going to be uninterested to tears.
Before planning your first date, you should think about her interests as well as her personality to decide which first date idea you can try.
What you should do is just to pick something new to both you and your date (that also needs to be within your comfort zone, of course), and remember to take part in classes for beginners for the best results.
If you really want not to shake it, you can choose Tai Chi, rocking climbing, or anything else instead to suit your interest and ability much better.