Had mine in early August so fairly recent.
Wear a top that opens down the front, I was marked up for the surgery without having to get undressed. It's also easier to get back into when you get out of your theatre garb and back into your own clothes. Similarly, wear something easy to get in and out of on your bottom half. Your arm will probably be a bit uncomfortable to move immediately after the op. I alsp took some wipes for my face so I could freshen up when I got back to to ward and also left a hair brush im easy reach. For me, after the surgery, it was about becoming a person again and not just a patient. Bit of a control freak maybe? Also, start drinking water as soon as you feel able, you'll meed the loo, but getting up to go will make you move amd that also helps. Worked for me anyway.