Hi lookingtoloseweight,
I am not a medic, but my understanding is that it is better not to skip meals if you are diabetic. So probably best to aim for three small meals to start off. Are you getting any advice from your GP or practice nurse to help you? Also the original BSD book will give you lots of good background.
Calories are the measure of the energy in the food, which comes from three groups: carbohydrates, fats and protein. The idea behind the BSD diet is to reduce carbohydrates (sugar in all its forms), eat healthy full fat foods, and of course sufficient protein. As to tracking calories, some people here use an app to keep track. I use SparkPeople – a free US site. You can use the info on the back of the packet to fill in the detail, although you may find it better to eat less processed food, which often has sugars added.
At the beginning, I would suggest you keep things simple: avoid the obvious white carbs such as sugar, flour, rice, bread and pasta. Eat a wide variety of above ground vegetables (root vegetables such as carrots and onions have quite a bit of carb in them). Eat healthy fats such as full fat Greek yoghurt, nuts, avocados, olive oil. Make sure you have enough protein through eggs, lean meat and fish. Go easy on fruit, particularly sugary exotic ones like bananas and mangoes. And drink plenty of water.
If you get started on these lines, you won’t go far wrong, And you can finetune as you go. Do have a look at the book, which explains things far better than I can. http://www.dietdoctor.com is also a really good source of ideas on healthier options. Good luck on your journey!