Sounds like good progress thus far.
Lower back pain was a big flag for me too. I worked out a very light Pilates routine based on the NHS Pilates online video which helped quite a bit. Just some basic stretches etc but obviously going to be case specific.
Just keeping it flexible and mobile seems to help. I’m six weeks in today. Sitting at computer still painful so just remote access main system with laptop remotely from the sofa.
Things are settling so hang in there. Seems some big improvements in the last week in terms of no drips/leaks plus erections appear to be back to pre-op levels (taking tadalafil 2.5mg every 12 hours - I break tablet in half).
How is the continence progressing?