I know virtually nothing about using insulin, but I do know that high blood sugar numbers, like yours, in the presence of large amounts of insulin will mean that the weight goes on. If you are T2 and are carrying extra weight, you will be insulin resistant - this means that you need more insulin to get the same effect :? This is not good.
You can carry on with those "everyday foods" you are currently eating and use insulin to cover it, but your weight will continue to rise, and with it the insulin resistance as well as the quantity of insulin you use.
Succesful diabetics reduce the amount of starchy carbohydrate they eat - bread, pasta, rice, potato, banana and flour products. This is much more than cutting out obvious sugar.
I think you need to inform yourself about how blood sugar works and then decide how you want to deal with your high readings. The most useful information on blood sugar I found before I found my way here was at
http://www.bloodsugar101.com an American website which now has the UK blood sugar readings listed too - this means it is much easier to read if you don't have American as a second language. Really simples!
I reduced my HbA1c from 7.8% at diagnosis in Feb to 7% in May by cutting out all added sugar and junk food and adding fresh and raw, mostly glycaemic index (GI) principles. I went low carb in may and further reduced that to 6% on a low carb diet and no medication at all. I'm now taking metformin as I want to lose weight and get to a normal blood sugar a bit faster than diet alone.
Whatever you decide to do, you need a diet you can stick to for teh rest of your life that will help you lose weight and manage your blood glucose.