It looks really good! It's quite large, lots of room for living out there. The flagstones would be my choice too, and moss. Less to mow and very classy. Well done.
You've done so much to this house since you bought it. It's really shaping up. How many years have you been in it now? Three?
I bought it on Dec 11th, 2020 and moved in post haste
It has been a challenge, an expensive but rewarding one 💚