I went with Cat6 I’m sorry I didn’t go with Cat6A.

1. fiber is absolutely worthwhile.
2. In my experience you can have the fiber brought to your hub, but your provider likely isn’t going do that for you. You will need to call them for the Fiber, and then have someone else run it, then call them back to terminate it(again based on experience)
3. Whether mesh works for you is a decision for you. It doesn’t pay for me, in my environment. I’d have paid 3K for the latest net gear mesh system. When I could invest the same 3K in a much more prosumer system with a top of the line router/switch/AP. But you have to make that decision.