Yes. Initially it is best to choose one single pair. Spend time to observe that pair as much as you can. Every pair has Its own characteristics. You will find some unique characteristics of that pair. Study them and test them. It's a trail and error process. Once you are well familiar with one pair. You can choose another pair.
That is my advice as well. It's not a good idea to divide one's attention onto several pairs, especially as a newbie. Study them one by one.