Mark...So thrilled to hear that you have the surgery in your rearview. Push it forward and don't look back. "Push" is just a word meant to encourage, as the WORST thing you can do right now is "push" yourself to do anything. PLEASE take good care of yourself, follow doctors' orders...As HTurtle says "Slow and steady wins the race".
Yes, no doubt you will have to make adjustments to this "new normal". Focus on what you CAN DO when you are recovered. Often times it's as basic as "gratitude" for your blessings. You can walk. You can talk. You can take that shower...The rest will come in time.