My understanding of insulin use is limited, but my understanding is if you reduce your carbs, you can then reduce the insulin, and this will help with weight loss. I hope this helps.
By the way, be careful what fruit and veg you eat, things like banana's, grapes, melons are usually higher carb, but things ending in berry are usually fine. Try to make up the bulk of your veg with things grown above ground, as they are usually lighter in carbs too. Cutting the carbs, really will help your weight loss, once you can begin to reduce your insulin.
Good luck.