Willing to learn

Those who had not had the gospel in their lives were much more open to learning doctrine when it was preached among them than those who had rejected such truths previously

It took the sons of Mosiah 9 or 10 years to have this great harvest. While Ammon may had found an opportunity 3 days after coming to Lamoni, we don’t know how long it took him to arrive at the land of Ishmael.