I received a reading of 42 just over a week ago, so I'm new to this as well. Gone from being in denial, to being too scared to eat anything other than veg and protein, but I've levelled out now.
I received details from my surgery of the NHS Healthier You programme - you can either attend in person sessions with others or do it online - it might not be in your area but worth asking about and might help.
Until I know more I've decided to make minor adjustments without being extreme. So last night no potatoes, but I had a lot more veg. I'm alternating breakfast between greek yogurt and berries and a lower carb cereal to what I was having. Made a large crust less quiche the other day as that's something that's ok in the fridge for 2-3 days and I can have for lunch with salad or veggies. I tend to go out a lot socially for coffee (and cake) and meals out, so am going to get some lower carb cereal bars - Nature Valley and Graze, so I have an ok(ish) treat with my coffee instead. Eating out,I'll ask to swap potatoes/rice/chips for extra salad or peas. Pasta dishes will be less pasta and more veg included. Also, am going to try some new recipes. Not sure if it's enough, but I think this will slowly help me adapt and if I need to do more, it won't be so bad.