The stuff I'm reading online, it seems like it's a couple days before you can shower and will need assistance because you'll be weak.

My dad was in the shower the very next day after his surgery, it was part of his rehabilitation to know exactly how to get in and out of the shower without injuring himself.

If you're worried about your hair, they do have a really cool thing that looks like a shower cap, but when massaged on the scalp, it turns into shampoo and cleans your hair. It even warms up, so you're not getting a cold shampoo. Once they're done cleaning your hair, they dry it off with a towel and can apply some leave-in. Is your hair long enough to braid? I would see if you can get someone to braid it or wear it in a high messy bun. That way, you're not always running your hands through it and adding oil to it and it won't get dirty as quickly.