The Netziv writes, “If someone will ask you: Which approach of Torah study should
I follow, and which mitzvos should I focus on the most? Reply ‘Follow your heart.’ (Koheles 11:9). Wherever your heart pulls you is a sign that your mazal understands that this is a good way for your soul.”
This rule also applies to approaches in Torah study. There are many approaches, and there are many focuses. The heart’s pull to a certain section of Torah is a sign that Hashem wants him to excel in that realm. ~ R’ Elimelech Biderman Shlita
Whatever it is that you choose to learn over Shavuos is exactly what your neshama needs. Learn well and have a wonderful yom tov!