Hi, Judy, and welcome to the forums! My boy Willie got his diagnosis just a month ago and it's amazing how time has flown. When getting started, the more info you have, the better. You'll notice the folks here use a uniform numbering system for giving shots... AMPS/PMPS designate the number right before you give insulin (morning and night), and then you go +1, +2, etc. from there. As a newbie, I like to try to get a +11 or a +11.5 before getting the +12 so that if that pre-shot number is low, I can confirm that it is moving upwards before I give him a shot... and this can help prevent delaying a shot if the numbers are close. As Sue mentioned, you'll want to get a curve when you can so can plot out how Annie reacts. Doing a few curves has taught me that Willie tends to nadir around +7 and doesn't really dip downward until after +3 (generally). Important clues to help me fine tune my testing, esp. given that I work full time and am doing this on my own!
I hope you'll take the time to read the stickies in the forum for your insulin, and consider setting up a spreadsheet. I have found it to be an invaluable resource, both in terms of getting support here and from the vet, who can look up Willie's numbers in real time if I have a question or if she just wants to check in on him.
Again, welcome! You're in the right place!