Hi
I know its difficult to get your head around all the information in the early days, especially the diet advise for low carb healthy fats (we have been told for over 20 years to eat low fat so it will take a while to be de-programmed).
With regards to travel insurance, try some 'standard' rather than specialist companies, a few weeks ago I did a shopping around day for insurance for holiday to USA. For 3 of us - all with pre-existing conditions a number of the specialist companies for pre-existing or mature travellers quoted ridiculous prices! I bought insurance from Sainsburys bank, they didn't charge extra for Diabetes if you are not on insulin and haven't had a hospital admission for diabetes in last years.
Keep posting on the forum, ask any questions you want no matter how small, this site is great for trying to make the learning curve easier.