The question above for the most part, been reading up on it. Also want to it for learning purposes.
Because devices in your LAN will all be accessible from the internet with IPv6, you need to firewall every device.
It becomes more of a problem for IoT devices which you can’t really control. If you can, disable ipv6 for those.
Definitely dual stack if you do. The real benefit of IPv6 is that, supposedly, each of your internal devices can have its own address and be directly accessible, but I don’t think anyone actually wants all of their internal network exposed to the internet. My ISP provides IPv6, but only a single /128 address, so everything still goes through NAT.
Setting it up was definitely a learning process - SLAAC vs DHCP; isc’s dhcpd uses all different keywords for 6 vs 4, you have to run 6 and 4 in separate processes. It’s definitely doable, but I think the main benefit is the knowledge you gain.