Complex sentence: Whishaw as well, learned how to write with a quill and ink during filming, and the letters that Fanny Brawn receives from Keats in the film were actually written by Whishaw in his own hand.
Split into simpler sentences: Whishaw as well, learned how to write with a quill and ink during filming. The letters that Fanny Brawn receives from Keats in the film were actually written by Whishaw in his own hand.