Welcome! I, too, am a newbie to all of this and so have more support than wisdom to share, but I want to let you know it gets easier. Home testing seems daunting but, at least for most, becomes routine fairly quickly. For me, at least, testing is by far easier than injecting the insulin. Because I give Dusty treats, she's starting to associate the tests with delicious chicken and so sits quite well as I draw the blood and test it. I've now been doing this for just a week and already it takes about a minute to test. Which is just to say that it's very doable. (And, because you can use human glucometers and test strips, it's also reasonably affordable.)
I'm sorry that your kitten has diabetes and that you had to discover it in such a horrible fashion. Know that it gets easier and that there are a whole lot of smart, caring people on this board who are eager to help.