40 is an incredible score for 9 holes if you have only been playing for 3 weeks. Remember though that the fresh air shots still count, as do the duffs that go 2 inches, and you have stroke and distance penalties when you lose balls.
And yes welcome to the forum.
[BTW Am I the only one thinking some is some kind of bizarre windup? Has anyone ever been that good after 3 weeks playing?]