Wow. That’s a big deal.
Intrigued to know what the second life change is, but really just wow that you have made the decision. It is always something you can go back to.
It does eat your life, and for me a small person who is now 5ft 9 kind of took priority for a few years.
Your point about imaginary careers is typically well put. However I don’t give up on seeing your name on Waterstone’s bookshelf. Never is a long time.