Complex sentence: It was his love of nature and friendships with the Amish culture that curried interest over much of his his career, in creating narrative paintings and drawings that captured the Amish at work and play in Ohio, Pennsylvania and Indiana.
Split into simpler sentences: It was his love of nature and friendships with the Amish culture that managed his focus over much of his his career. Where he created narrative paintings and drawings that captured the Amish at work and play in Ohio, Pennsylvania and Indiana.