I just started with ipv6 yesterday with an ipv4 only ISP.
Works ok using a socks proxy with Google Chrome, using Gentoo
and a $15 a year ipv6 enabled VPS.
The webserver on the vps is working and this works (ipv6 only)
http://ipv6.keithfernie.tk/python3/externalip.py
(http://ipv6.keithfernie.tk/python3/externalip.py)
It should show the ipv6 address you are using, previously used
to find dynamic ipv4 addresses.