Tony,
Welcome and congratulations! I admire anyone who came through treatment like you have.
Thankfully, I have an amazing wife and family, with lots of support. I can't imagine not having that network...I'm not sure I would have come through this as well, or at all.
I had SCC in my left jaw, which they removed and reconstructed using bone from my left and tissue from my arm, then 30 radiation treatments. Yesterday marked 6 months post surgery, and I haven't returned to work full time yet, and likely won't for several more months. Depression is really common after treatment ends, and you don't need to suffer from it. Talk to your doctor and take medication for it. Don't let it get too bad.
All the best
Wayne