Welcome to a fantastic community of experienced and helpful individuals. In order to take full benefit of any advice on offer there are a couple of things you will need to set up.
Firstly, set up your signature. This provides general information so we don't need to ask every time you post. If you go to your name top right hand side of the page. Click and you will get a drop down box. On the left you will find signature. Type, cats name and yours if you like, age, weight, date of diagnosis, type of insulin and the meter you are using and food you are feeding any other issues and your location or timezone. (We have members all over the world so it can be important if you need help) don't forget to save when done.
Secondly, we all use a spreadsheet in order to track BG's. This is a very useful tool for you and for anyone helping you with advice. You will find out how to set it up under "tech help"
If you have any problems just post back and we'll get someone to help you.
I know you are probably overwhelmed right now with the diabetes diagnosis, we have all been there and understand how scary it can feel, but it is manageable and once you get started it can, in fact feel very empowering. Just a little housekeeping to do initially so that you get the most out of this forum.
Again a huge welcome to you and Simba. Great picture of the little guy btw.