Complex sentence: She married John Gould in January 1829, and he encouraged her to learn lithography and had his collaborator Edward Lear teach her, becoming proficient with the artform she went on to use to create illustrations from his drawings.
Split into simpler sentences: She married John Gould in January 1829, and he encouraged her to learn lithography and had his collaborator Edward Lear teach her. Becoming proficient with the artform she went on to use to create illustrations from his drawings.