It's a common reaction for many people to expect a rapid response to their efforts to lose weight or control blood glucose. The first lesson to learn is patience. After all It probably took some time eating incorrectly to get to a stage where we are overweight or diabetic or both. One of the most effective weapons is information and awareness otherwise we are just engaged in hit or miss followed by frustration. Many diabetics find that by self monitoring their blood glucose they are able to eliminate problem foods or at least drastically reduce the amount of problem food they eat. If you haven't yet been allocated a place on a diabetic education course you should follow this up with your Dr. Good information sources are a book by Jenny Ruhl called Bloodsugar 101. This is easy to read and very informative. There is also a website of the same name. WWW.phlaunt.com is another good source. To answer your question ref ratios there are a number of easy to use calaculators readily available on line. Pick one you're happy with. One possible is keto calculator.ankerl.com but there are many to choose from. With a disciplined approach there is no reason why the vast majority of diabetics can not live healthy and active lives. I wish you well on your journey.