Milk is a basic food for people, and it is generally advisable to drink it after three meals a day. It is best to drink one bottle for breakfast every day and two bottles in the morning and evening. You can also drink it outside three meals according to your personal living habits, but you should pay attention to eating starch-rich food before drinking, so that milk can stay in your stomach for a long time, which is conducive to the comprehensive absorption and utilization of nutrients. This is why it is not advisable to eat on an empty stomach. "Morning, noon and evening are fine, and it is best to drink after meals."
After reading the little things above, you will know that your method is quite good, just don't drink on an empty stomach.
How high is hyperglycemia? The following website has a very good introduction about diabetes, I suggest you have a look. (It is a slide organized by the National Promotion Project Guidance Group of China Diabetes Prevention and Control Guidelines. Very good, it may be a little slow, but you must watch it. )