Complex sentence: Although Chávez Morado took classes in California and Mexico, he is considered to be mostly self-taught, experimenting with various materials, being one of the first Mexican artists to use Italian mosaic in monumental works.
Split into simpler sentences: Although Chávez Morado took classes in California and Mexico, he is considered to be mostly self-taught. He experimented with various materials, and was one of the first Mexican artists to use Italian mosaic in monumental works.