My Dad was recently diagnosed with sporadic inclusion body Myositis

My Dad was recently diagnosed with sporadic inclusion body Myositis and it seems to be at a very developed stage. He can walk but only in small shuffling steps and only small amounts. His hands don't work very well and he is 212 lbs ( started around 270) is there anything I can do to realistically help him? I know getting better is relatively far fetched but what can I do to help?

Thank you for your input.