The entire book of Leviticus is about the function of Israel’s high priest. Yeshua (Jesus) is our High Priest, and as we study Leviticus, we learn more about what Yeshua is doing for us in God’s presence.
Leviticus 1-3 starts with instructions about how to give free will offerings to God. These are not offerings of punishment but offerings of gratitude and love of God. We also learn how the High Priest prepares and gives these offerings to God. We can see the New Testament fulfillment in Yeshua as we read through Hebrews 5.