I remember IPv6 being difficult.
I remember using he.net year ago for their IPv6 tunnels years ago, and have painful memories of configuring it, both on the router and to share to the subnets on my home LAN. Not this time. Years ago, I had Comcast Business Internet service, which along with providing a static IPv4 address, provided IPv6 connectivity. Not only just a single /128, but a whole /56 if you asked for it. After spending days/weeks configuring both dhcp client and servers for prefix delegation, and slaac/rtadvd to hand out addresses to my various LAN segments, I was in business. Flash forward to 2018, and I’m on a residential Verizon Fios connection, which provides a single dynamic IPv4 address, and no IPv6. Really, no IPv6 connectivity in 2018. Not here. Or here. Or here. Not here either. Your only option is to check out one of the IPv6 tunnel providers out there to wrap your IPv6 in IPv4 and go that direction. ...