Amanda, diabetes in cats is really pretty straightforward, and there is alot you can do on your own, at home, to help. Everyone on this site either has or has had a diabetic cat and almost all are regulated or off insulin. But we all started out just like you - scared and overwhelmed.
There are 3 basics:
Insulin. Start low (.5 to 1 unit 2X day) and go slow with dose increases. The most popular insulins here are Lantus, Levemir and PZI. There are separate support forums for all three (
viewforum.php?f=5) so when you go there, read the stickies on the top of the page, and read through some of the posts on the page. That will give you an idea of how the insulins work and what kind of success/challenges they present. All three are good insulins, long duration and slow acting, so they are easy on the cat.
Food. Start with this website:
http://www.catinfo.org. The vet who put that site together does a great job of explaining why all cats, but especially diabetics, should eat a wet lo carb diet. Another member here put together a food chart:
http://www.felinediabetes.com/diabetic-cat-diets.htm PIck a food between 8-10% carbs that you can afford and that your cat will eat. Limit seafood to once a week or so. Caution:
Don't change the diet until you are hometesting. Wet lo carb can dramatically bring down blood glucose levels.
Hometesting. This is probably the best thing you can do. We figure we wouldn't just shoot our children blindly with insulin, so we won't treat our cats that way either. We poke our kitty's ear to get a drop of blood and use a human glucometer. Here's a video:
http://www.youtube.com/watch?v=_zE12-4fVn
The truth is you have a lot of reading to do. The FAQs are an excellent beginning place. Come back often with questions and concerns. Everyone posting to you is paying it forward because someone helped them when they were new. This is very doable. We will help - not only is this site a great education, it's a great support system too.