TIPs I can give from my experience - get good support bras and get at least 2 or 3 so you can wash and alternate as you will get sweaty wearing them 24/7. Food and diet wise, as you will be sedentary in recovery I did loads of batch cooking of good healthy meals so could just get one out the freezer when hungry rather than scavenging in my fridge and cupboards which had less healthy stuff in them! I got badly constipated and I still am so get Senna laxatives, prune juice and eat plenty of fibre. It appears to just be the way it is and to accept it and prepare which I didnt do and wish I had. I had prebiotics too post surgery and supplements for gut health. Also got a pregnancy pillow from painaustralia.com.au which was a godsend for sleep as if you are a side sleeper it's very painful and uncomfortable. I called my pillow Chris Hemsworth and ended up trying to do turn it into a joke to laugh through it all!
If you shave your armpits get some of the hair removal cream as if you lose any temporary feeling under your armpit the doctors say not to shave there as its numb and you may cut yourself.
Final tip is I got a shower head you can attach to a tap so I could wash my hair when I wasnt able to have a full shower. Most dressings now seem to be 100% waterproof but had a few moments when I couldnt shower for 2 - 3 days so this was very useful. You can get them from Kmart and Big W very cheaply.
Hope any of these can help you as all the above were a learning curve for me.