Welcome to you and Miss Kitty!
Lots to learn, but great support here. It can be overwhelming, but we all started in the same place you are and it really does get easier the more knowledge you have.
The yellow stickies at the top of each board have a lot of great info.
A couple of important things to read about are food choices and home blood glucose testing. Once you are testing, we have a spreadsheet to log blood test results to help track how your cat is reacting to a specific dose of insulin.
One thing that would also help is if you can set up a signature with particulars like your kitty’s weight, diagnosis date, type of food, other health conditions, type of insulin, etc. this will help other members to answer your questions and not have to repeatedly ask about the basics of your cat.
Setting up your signature (light grey text under a post). Here's how:
click on your name in the upper right corner of this page
click on "signature" in the menu that drops down
type the following in the box that opens: kitty's name/age/date of diabetes diagnosis/insulin you're using and dosage amount /glucose meter you're using/what (s)he eats/any other meds or health issues (s)he has. You can add your name, and a geographic location (sometimes the time zone matters) Be sure to SAVE when you are finished.
Once signature is set up it will be easier to assist with advice.
You can post future health related questions to the main Health forum. There are also specific insulin forums with knowledgable folks for what type of insulin you are using. This is mostly an intro area.