Beefsteak

Hi, I'm a 68yo with some D2/Pre symptoms and would welcome comments on my diagnosis and lifestyle changes for the future.
My symptoms are hot/cold/tingling feeling in my feet - often, but not always.
Some blurry vision - although I do have cataracts too.
No great thirst, but tend to want to urinate in early morning - esp on waking.
Fasting glucose (o/night) 5.2-5.7
Response after a fruit juice and brkfast w. cereal/grain/dried fruit and nuts is a peak to about 8.5 then drop to about 4.2 in about 3.5 hrs.
Q. Is that full D2 or pre-D? I am assuming it is at least pre-D.
My diet is normal - i.e. a non-diabetic diet with fish and cooked veggies, some pasta and breads (mainly whole grain), but also carbs from daily cake and perhaps a muffin. I have always liked carbs. I am slim and don't eat much really. I walk about 2-3 miles (4km) every day. I don't have butter, marg or fats, and only skim milk. A weekly meal out is my treat.

I want to change to a low carb diet of course. But first I wanted to try a raw veggie blended drink - making about 1 litre and drinking it in two 500ml glasses a day. I went and bought a powerful blender today. Q. Is this tinkering at the edges I wonder or can veggie blends have an effect? I am having trouble in finding out what are the best veggies for D. Most websites seem to want to sell something. Where can I get that information - I've been thinking of trying celery (incl tops), tomato, spinach/silver beet, frozen mixed berries, an apple, and maybe some fresh pineapple for flavour and fibre. I forgot carrot. How does that sound?

Comments most welcome. Beefy.