Welcome to Bonesmart! Congrats on the new knee!
You sound like most of us in the beginning; confused, challenged and dazed. This will sort itself out over time, but that is what is most challenging is the time aspect. The recovery process is just that, a process. It will move at the pace your knee sets, and nothing else. I have found that the advice here that less is more in recovery truly does work. Slow, steady, manage pain, ice and elevate are the most important things to do.
Something else you might consider is keeping a little journal of how you feel and what you do each day. Especially when you start with pt. with drug induced brain fog, I found it hard to remember everything days after when questioned by pt or OS. It also can be a source of comfort when you hit a plateau and feel like you haven't made progress. Just a suggestion.
Do bring your questions and concerns here, as this is a very knowledgeable and compassionate group. While we are connected by cyberspace, I have never felt more supported in any challenge I have faced.
Be well and let us know how the staples removal goes!
Dawn