Hello
@jdn and welcome to the forum
Rather than wait for you to ask, here is some basic information:
Both Type 1 and Type 2 diabetes is diagnosed by abnormally (even dangerously) high Blood Glucose (a sugar). Type 1 diabetics can't make (enough) insulin and so will always need to inject it. But Type 2 diabetics suffer from 'insulin resistance' which means that the insulin they make doesn't have as big an effect in pushing glucose out of the blood stream as it should. And in many cases we actually produce very large amounts of insulin indeed!
Since you are a Type 2 on insulin, you fall somewhere in between and need to be careful about reducing the carbs you eat because the amount of insulin you take will be based on an expected amount of carbs being eaten.- and you don't want your Blood Glucose to go too low !
What causes the high blood glucose to keep refreshing is the carbohydrates we eat. All carbohydrates start turning into sugars as soon as we eat them (sometimes even while still in our mouths). So we need to try and limit the amount of carbs we eat. Not only sweet sugary things, but even starchy things like grains and starchy underground veg too.
Things to reduce/avoid are: potatoes and other starchy veg (parsnips, possibly carrots), flour and grains (even wholemeal), tropical fruit and particularly fruit juices - these often have more natural sugar than a sweet carbonated drink has added sugar and although natural sugars are very slightly better than refined sugar , they are still a big problem for us.
What is good to eat are foods with either no or with low carbs: Meat, Fish, Eggs, Full Fat Dairy (don't fear natural fats - fat is an essential macro nutrient where carbohydrates are not essential), leafy green veg, nuts and seeds, low carb 'fruit' such as berries, rhubarb, avocado etc.