"First outing" refers to someone's initial or first experience of doing something or going somewhere outside of their usual routine or comfort zone. Full definition
I swear I had this exact same bag when I was first out of college — many years ago now! (unefemme.net)
And life insurance policies typically have a first in first out schedule for withdrawals, which means that the first money that came in, is the first to go out. (insuranceandestates.com)
This will be the studio's first outing on PS4. (mcvuk.com)