Has your doctor referred you to a diabetes educator or a diabetes nutritionist. If not, ask him -- no, tell him you want those referrals. Make sure he refers you to an experienced diabetes nutritionist because not all nutritionist are well versed in the specific needs of diabetics.
Having said that let me say that when I was first diagnosed, I was told that 4 oz of raw meat is equal to approximately 3 oz of cooked meat due to shrinkage. I was told to weigh my meat cooked.
As for water there are two schools of thought. One that says it must be water, and another that says you could count tea, coffee, even milk as part of your liquid. But think of what water does for the body that other liquids cannot. Water is purifying, it helps flush toxins out of the body. Other liquids cannot do that. So even if you drink coffee or tea, etc, you should make sure you get in your water as pure water.
I hope this helps.