Mother recently diagnosed with B-Cell Non-Hodgkin Lymphoma

Hi Dr. Berg. I've been watching your Youtube vids (both medical and recipe vids) now for a couple of years and I'm a big keto lifestyle guy! Thank you for all your help with understanding what a keto lifestyle entails. My mother was just recently diagnosed with B-Cell Non-Hodgkin Lymphoma and will start chemotherapy in a few weeks. They will be administering methotrexate into her chest. Question - I'm a big advocate for the keto diet and believe it can help reduce cancer, what can I do to help my mother get into the keto diet/lifestyle and follow the guidelines set forth by your videos?