It would be nice to have a post-op recliner or some means of elevating your leg.
Other than keeping up or slightly ahead of your PT schedule, You will want to control the swelling of your leg. Swelling will cause a lot of pain and problems for you. Sitting with your leg down in a chair will lead to fluids pooling in your lower leg and make your leg feel "heavy"
One way or another you will want to elevate your leg and apply ice to the area to keep the swelling down. Icing your leg will be an important part of your PT, don't skip it at anytime. I sat length-wise on a sofa with a small pillow under my knee when I was icing my leg. I'm not sure if you will get a wonderful pair of white stockings with your new knee, but if you do, wear them.
When you sit to ice, do your heel pumps and all the exercises you can do. When you go to bed, if you need to, place a small pillow under your knee for a little extra support.
One thing I had to constantly remind myself to do is, when I was walking without crutches or cane, was to take normal strides. I was on my way to training myself to hobble. If you train yourself to take full, natural strides, you will continue to walk without a hobble. Keep an eye on that one. No cheating.
I believe you will be surprised at how quickly the pain will subside and how soon you will be back to "normal".
You will have to be honest with yourself about how you are going to hunt this coming year. It sounds like you hunted the deep dark stuff last year so I don't see why you couldn't this coming year.
All I can say is, Do not pity party yourself. You are in for some pain in the coming future. The pain is NOT bad. Power through the pain, set high bars for yourself and go forth and conquer!
Of course, listen to your surgeon and your PT. Let them know you are not a Suzy Rottencrotch and you are going to push yourself to make this surgery as successful as it can be. When you are sitting in the doctors office waiting for your follow-ups, take a look at the other patients who have had surgeries done. You will be able to tell the people who want to get themselves better and the people who have decided to use the miracle of modern medicine to show everyone how bad they have it.
You do not sound like the latter.
Good luck with your surgery. If I can do anything to help, let me know.
JW
Semper Fi