The next instruction is about love. But it is not next in priority. This Scripture says "first of all" or "most of all." Meaning love has first priority.
Why does God give love first priority? Because life is built on relationships. It is not built on jobs, accomplishments, or adventures. Life is built on God and people, and people and people, connecting with one another.
And love is important, because relationships are messy. People make mistakes, act selfishly, and sin. Love covers sin. Love makes relationships possible in the middle of the mess. Love makes unity possible when there is failure and sin. And it is love and unity that demonstrates God's nature to the world.