also RHS MX in june this year. as above the zonta pillow is a godsend nd the bag for the drain is so good. my drain was in for 3 weeks so i had to get used to it - nicknamed it derek - he came everywhere with me.
we also have a cat. animals are quite amazing at working things out. he never once got caught up in the drain - sleep on yr RHS still, its ok, put the drain bag on the floor - so when you get up to wee just pick the bag up and off you go. he slept on the bottom of the bed and all was fine. all animals are different.
for showering i used a wreath hnager on the side panel, if you dont have one then on the floor or chair outside is fine.
sleeping - set up everthing on yr side of the bed eg long phone charger, random reading material, crosswords, whatever you like to do, as well as scar cream and water bottles
youve got time. youll sort it out. good luck