Welcome to the forum, as a lurker you must have picked up lots of information from people about the importance of reducing the amount of ALL carbohydrates in your diet. Your HbA1C results indicate you are only just into the diabetic range so some modifications to your diet in reducing portion size of high carb foods and increasing protein and healthy fats. I hope they will have given you the opportunity to make some changes for a few months before starting metformin.
Making a food diary will help to see where savings can be made.
I'm sure you will have picked up that some of the problem foods are bread, potatoes, cereals, rice, pasta, starchy veg, pastry as well as cakes, biscuits and sugary drinks and also snacks like crisps.
Have a look at the thread in the food forum to see what meals Type 2 folk have bearing in mind some people will be dietary managed and others on meds so the amount of carbs per day people have will vary as will their tolerance to different foods.
Giving a few examples of what meals you have will help people to make some suggestions for where substitutions can be made.