Have you read the website 'Bloodsugar 101' and the stickies at the top of the Diabetes forum? If you change your eating plan, you will have immediate results. It will not "take time"!
Eat a lot of vegetables. Nuts are fine, cheese (although I don't know what kind of cheese you have where you're living). Fruit can cause high blood sugar if you eat a lot of it, especially if it's at one time. Berries seem to have a lower impact on blood sugar for many people (me included) compared to fruit like pears or apples. Bananas and melons for some reason seem to cause higher blood sugar. If you eat any of those (or other tropical fruit), do so in moderation. Root vegetables have a lot of starch and will probably raise your blood sugar.
Rice and noodles will too. However, you will know how they affect you by testing your blood sugar two hours after you start eating your meal. If you begin eating at 1:00, then you test at 3:00 (or around that time).
The best thing for you to do is to keep a daily log of your blood sugar: morning fasting, what you eat for breakfast and what time, your blood sugar 2 hours after you start breakfast, and so on. This should guide you how to eat.
I don't know what other health issues you have or what the causes are. I DO know that living with high blood sugar for some years (doctors can't say how many years) will cause problems with: your heart, your kidneys, your eyesight and your nerve endings (particularly in the feet: neuropathy).
You are really lucky that your blood pressure and cholesterol are in good shape. Great! Drinking may damage the liver of course but it may also damage the pancreas and cause pancreatitis. So, it might be wise to cut back on that if that's been a problem. (You already know this.)
Changing your diet in this way and doing some kind of regular and sustained exercise will help a lot. By 'sustained' I mean for at least 15 at a time; longer is better. Exercise uses up the glucose running around in your system and helps keep your blood sugar under control.
Laniediabetes moderatordiabetes type 2 controlled by diet and exercise and
very low carb way of eating