Hi ben,
I feel ya pain, there are so many of us out there that normal regimes don't work for, and nobody ever seems to listen do they!!!
I too am sensative ato almost every form of sugar, be it sugar alcohols like maltitol or even worse normal sugar, even fruit and veg which i got told to have plenty of sends my BG's sky high.
If your new to insuin, and this is just for my body personally, yours will be slightly different, especially with you exercising.
Check your sugars before you exercise, then again before you eat/drink anything, just to see if the exercising has brought your levels down before you have the food/drink.
Then work out the units lowered if any by the time spent working out, so it gives you a foundation of how much ya sugars get lowered while exercising.
Check the carbs in the food/drink your going to have, also the carbs that sugar, for me personally I find the most important.
For the first month it going to be trial and error, seeing how your body reacts to your favourite foods, as well as how it copes with the insulin.
Keep in slices of meat and packets of cheese, then if you get hungry it something to nibble on that will hardly effect your BG.
And only take what your GP/diabetic specialists say .
But please please please dont starve yourself, it aint the answer and will actually do you more harm than good.
I hope that helps
PS: it's how I have kept control of mine for the past 20 months now.
