Wow, what a great proactive attitude,
@c_s_k22. It looks like you may have this thing beat in no time.
Lots of us T2s have been able to return to normal blood sugar levels by eating very few carbs (eliminating sugar, bread, cereals, rice, noodles, potatoes and other starchy food from our diet and often raising the fat content if we feel hungry. Protein pretty much stays the same). With time, I personally found substitutes for some of the foods I missed (see for example the dietdoctor website for alternatives). For me this has been easy and I really don't miss my old way of life, especially as I now feel tons better. As a positive side effect, this way of life often also helps us lose weight without feeling hungry.
Using a meter can also help us determine whether the meal we had was good for us. The general rule is to measure blood sugar level before starting to eat and then again two hours after the first bite. The rise should be no more than 2 mmol. If blood sugars go higher than this, this is generally an indication that we weren't able to deal with something contained in the meal.
This way of eating is very effective in lowering blood sugars, but since you are only on metformin, you don't have to worry about going too low. Make sure to have enough salt in your diet to avoid getting painful headaches.
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