Log it before you sleep
The first gig is the one people swear they will never forget, then misremember the support and the year. Open Radar before bed: artist, venue, date, who you went with.
You do not need a review. You need a timestamp. The review can wait a week.
Do not wait until you are “a real fan”
Diaries fail when people wait until gig 20. Gig 1 is the hardest to reconstruct later because you took fewer photos and had no email trail of habits.
Free Radar gives you ten gigs. That is enough to decide if the habit sticks. The first night should be one of them.
What to ignore
Ignore ratings systems, Wrapped, and maps until you have a handful of nights. Those features need data. Night one only needs to exist.
If someone else booked the tickets, still log it against your account. It was your night in the room.