Ignore the sniping above.
Do you really think that the OP should "ignore" those points?
Look, I understand that we instinctively don't want to come down hard on a new diver who is brave enough to post here about a problem, etc...
But this is the classic definition of normalization of deviance, and I don't have to tell someone with your experience that that can be deadly. "Hooray! I survived! The take home message is that I am really good at this!"
Sorry, the OP's post was nothing but bragging. No insight at all, no questioning of why this happened, no wondering about how to avoid it in the future. "everything was fine... I handled it just right... I felt pretty proud of that... [it was] a “good emergency” experience".
Just look at the title..!! "First low air experience went GREAT!".
It wasn't "great". And it wasn't "low air", it was OOA. The OP ran OOA. There is NO excuse for that other than a catastrophic gear failure like a blown LP hose.
Congratulations to the OP for staying calm, but a little bit of humility is not a bad thing for a diver to have. Respect the sport.