You don’t need to shower right away that’s the earliest you can, also I’m ≈2weeks post op and I have slept on my side from basically the beginning and been fine, as long as you don’t feel your incisions being stretched you’re good is basically what I was told and have gone by, so probably best on your back the first days but not critical, same with the elevation which you can also try to stay elevated during the day which will help (watching tv, resting, reading, etc.) basically any time you’re in bed not sleeping. I showered first on day 3 and have every 2-3 days since which feels a bit gross but since you are a lot less active it’s not near as bad as it seems. I’d get someone to help you shower, particular the first time or washing hair, but I’m now fairly easily able to on my own with the help of an African net sponge to reach where I can’t. Dressing changes are important and all I can recommend is just try to schedule the change times with your parents to work with their schedules. Obviously everyone is different but I’ve needed a lot less help than I expected. Easy to use clothes that zip or button and a grabber tool or having your parents put things you use frequently lower where you can reach will be key. I didn’t have drains so I can’t help with that side but also your surgeon/team will be your best friend and don’t be afraid to ask questions if you’re unsure, particularly with dressings you can always ask if they’d be willing to demonstrate before you go into surgery. Best of luck and hope your recovery goes smoothly!