You label yourself a "doer" and you think the diagnosis'll hit you later... Good! It hit me like a ton of bricks the moment I saw what my numbers were, and I had to cope with that right at that moment, as well as being a control freak who wanted this thing licked yesterday!
Perk of having it truly hit you later: By then you'll already have your daily bloodsugars under control, so you'll know it's quite doable, which makes coping a
lot easier.
Seriously, you're off to a good start, what with the meter and the low carbing.
Conflicting info and having to figure out what works for you. Well... That is, alas, exactly how it works with T2. There's no cut and dry answers, as we're all different. The things that work for practically everyone who still produces their own insulin, are sometimes a little too drastic for their personal tastes (carnivore diet, keto). And with conflicting advice, sometimes it's just best to find out for yourself what works: being your own guinea pig. Your insulin production, resistance/sensitivity etc are unique to your person. And that's why having a meter is such a good thing. It'll tell you what you can and can't handle. Test before a meal and 2 hours after the first bite. Go up more than 2.0 mmol/l? Then that was a bit too carby and needs adjusting. Go that route and before you know it you could well be off of the metformin.
It's 40 degrees and over in the Netherlands today. Records are being broken here too. You'll probably feel a bit extra uncomfortable due to the temps, as diabetics and heat don't usually mix well. I know it always knocks me off my feet. So do take it easy, take care to drink enough and add some salt into the mix. Excersize can indeed wait. (And when you start, try doing things like long walks or swimming. The heavy-duty stuff'll get your bloodsugars up).
Good luck eh,
Jo
PS: This might help.
https://www.diabetes.co.uk/forum/blog-entry/the-nutritional-thingy.2330/