3 1/2 weeks way early. Cryocuff machine was my lifesaver and sleeping in recliner as instructed for 8 weeks. Assume you have started therapy. Hopefully you have a one on one same therapist each time. I found that two days therapy in a row was too much so always staggered days. It took 3 1/2 months before I could drive. It’s the hardest of the joint replacements. I was in therapy for a year. My surgeon would take X-rays at every visit to make sure hardware was good. My total knee was a breeze in comparison. Your therapist if a good one will be your lifeline. I used to bring a pillow in car for my arm.
Hang in there. It’s a long long journey. Invest in theraband pulleys which I still do daily since my reverse total shoulder in 2019. We have to work hard as I continue to date my pulleys therabands and weights daily. So early yet for you.
Slow recovery process but worth it in the end. Keep the faith! Recovery is not a sprint but a marathon, one day at a time.