It takes 6 to 8 weeks for your body to heal after having a catheter put in , i mean think about it , it has been placed deep in your insides , so to speak. For the first 2 weeks it will be quite painfull to do anything , so its best to just rest and let things heal up inside. Im not sure how old your dad is ? but the fitter you are , the worse the pain ( i know its hard to believe!) I was extremely fit ( a horse riding instructor) and because my stomach muscles were strong i was in agony , i walked round like an old lady !
You must get a laxative sorted out , constipation is common and wont go away !
You will also find your dad gets constipated while on PD so you might as well get some laxatives in stock!
While all the training to learn PD will seem daunting , once you are actually used to doing it , you find you could do it with your eyes shut! It becomes as easy as making a cup of tea after a while. Just be vigilant with hygene , to avoid infections and peritonitis ..Hope that helps ?