Hi Angie, and welcome to the board.
Pepper is absolutely right. This is a huge surgery with a long recovery time, and the doctors tend to downplay it. I was given a 15 minute sitting restriction for the first several months, but even that was too much. At first, I could only tolerate 5 minutes, and that was hard. It was very slow getting up to 15 minutes. Give yourself time. You'll get there! Walk as much as you're able, as it gets blood circulating around the spine, which is essential for bone growth. I made sure that every time I got up to use the bathroom, I stayed up afterward and walked for as long as I could, even if it was just back and forth in my bedroom for 10 minutes.
Hang in there, sweetie! It gets easier!
Blessings,
Emily