Why try and look 'experienced'?

Tell the crew it's your first time. Ask them to explain the seat, meal service, etc. to you. Ask to try all the champagne. Have a wine tasting with your dinner. Take photos. Play with the lighting.

Just enjoy it.

Genuinely, flying frequently makes me a bit jaded - but it always makes me smile when you see couples in J/F who area clearly super excited to be there. Reminds me of when I first walked up the stairs on a 747 all those years ago.