The most important thing you can do is simply to start and sustain a log for a time. The physical act of writing something down helps you to process the meaning of the data. Every meal is a little different about when it peaks blood glucose. I would favor sticking with just the 2-hour number but it would be good to know a few 1-hour readings. I think watching your numbers will help you decide about food choices. There's a popular strategy named "eat to your meter" that embodies that sentiment. Paying attention to the data is just the beginning. Changing your behavior in response to the data is important, too.
If it were me starting out I'd be tempted to just use a paper and pencil, but there are many worthwhile apps to help you.
Here's my insight into the power of getting involved in your personal data. When I follow my data, I find I naturally and subconsciously try to influence it in a positive direction. It's a virtuous cycle.