Neville!!! Omigosh, he is so cute! Loving those round white paws. Welcome to FDMB, you have found a wonderful resource and support base to help you help Neville to better health and wellbeing..in addition hopefully to calm and quell that overwhelmed feeling.
Do you know what insulin Neville will be getting? And what is the low carb food you are feeding now? Those (insulin therapy and proper diet) are two of the three main components of effective diabetic treatment. The third is home testing his blood sugar so you know it's safe to give the insulin injections and know how the insulin is working for him.
We can provide links to home testing tips, videos and pictures to help you learn this process, as well as what supplies and where you can get them. Testing does not have to be expensive, many of us use an inexpensive but dependable human meter and strips from Walmart, as when you are learning to test you might use a lot of strips. And having an affordable and available option means that you can have a good supply on hand in case of any low blood sugar events.
Home testing also saves expensive vet visits for curves, as well as the blood sugar raising stress from travel and just going to the vet!
A good place to start, and begin de-stressing yourself is to read the Getting Started and the Education sections on the Home Page.
Going forward, you can start a thread in the Main Health forum
HERE, as it is more heavily monitored than this Introduction forum (the welcome mat

) Ask lots of questions, we all started just where you are and we will help in every way we can.