Hi OP, do you know what your Hba1c number is?
There is a lot of information around low carb and keto but it's about finding what works for you.
I too was diagnosed when not overweight. In fact I had a normal bmi. I initially did keto and this did bring my number down but I really struggled with it and was barely eating anything and was underweight and still losing.
Anyway nhs guidance for low carb is anything under 150g per day. I started eating carbs, I stick to between 70 and 100 a day, and my hba1c initially went back up a few points into type 2 levels but then came down into normal after a few months of continuing with the same level of carbs. No medication.
Obviously everyone is different in the way their body reacts and even trying the libre on the free trial might help establish triggers.
Diabetes UK Web site has some good advice and there are many experts that are good if you want to try full keto. Sten ekberg is good.
As I say that might not be for all though I'd say it's good to drop weight quickly which I think helps for blood glucose reasons.
When I have carbs now I try to have very small portions of better ones, brown rice, wholewheat pasta, lentils and pulses but I do sometimes have a bit of brown sourdough bread too.
There are lots of keto/low carb recipes on line. If you do keto I'd recommend getting some electrolytes and a good multivitamin.
What you are looking to do is stop carbs and sugar raising your blood sugar. What the keto diet is meant to do is change your body to burn fats instead of carbs, that's good for losing weight and also for type 2. My issue with it was that I ran out of body fat and wasn't consuming enough of anything to live on.
Your diet now should be normal level protein, low carb, high fat. It just depends on how low you want to/need to go.