Personally, I think at the outset, you would be best served by testing your fasting level - as soon as you get up in the morning, then after breakfast, then before and after your other two meals.
Once I had a handle on things, I then focused on fasting and main meals for a bit longer.
I think many people find it relatively easy to get a grasp on main meal scores, as it's relatively easy to choose main meals where there is some form of meat, plus leafy veg or a salad. May folks, in my observation anyway, find lunchtimes and snackier meals trickier to fathom, as they're often eaten away from home, for example, lunches at work. They also, historically, can have focused quite carb heavy parts; bread in a sandwich or bun with a burger.
Initially testing can be heavy on the fingers and on the pocket, but it can ease up quite a bit once you get a handle on things.
Just on a point of detail, the 2 hours after test for your meal will usually show your blood scores beginning to come down from your peak rise. For most people, on most foods, their peak is at 60-90 minutes after eating. Very high fat and very protein heavy meals can be much, much slower to peak, and some cuisines, such as Chinese can be just bonkers to follow. Many people have more than one spike from on pportion of rice, but that's beginning to get too complicated for this stage of your testing.
Good luck with it all.
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