Great introductory post, Mel!
It's interesting to hear about the effect libre has had for you. I felt the same way too when I got mine - a real game changer.
There's been lots of posts from people who've been burned out to greater or lesser degrees and then suddenly becoming more engaged after getting libre.
I think one reason is that we're having to deal with a constantly moving target, and having libre lets us see how it is moving full time instead of the little snapshots in time strips give us. Makes it a much fairer game.
There's a useful book, Sugar Surfing, by Stephen Ponder, which taught me a lot about getting the most out of cgm, so maybe keep an eye open for that. It's on kindle.
His idea is to use the constant flow of info from cgm to make small adjustments here and there, say 1 or 2 units, or 5 or 10 grams of carbs to gently nudge levels back into line before they get too much out of range so you're not having to take a sledgehammer to a seriously out of range reading.
You can also bling libre up a bit to turn it into full on cgm - alerts, calibration, predictive lows - by putting a 100 quid Ambrosia Systems Blucon transmitter on top of it. It'll read the sensor every 5 mins and bluetooth the results to a free app xDrip+. The graph is way better than the usual one and it's nice having my phone ring when I'm going too low while sleeping!