IPV6 in a first firewall

RouterOS Beginner Basics
1

My ISP is only dishing out IPV4 and who knows if/when IPV6 will happen and what effect it will have.
But, I am building my first firewall and …
https://help.mikrotik.com/docs/display/ROS/Building+Your+First+Firewall
… says to add an IPV6 section, so I am going to throw it in there.
The problem is, sit1 is mentioned twice without a line defining what sit1 is.

add chain=forward action=accept in-interface=!sit1 protocol=icmpv6 comment=“icmpv6”
add chain=forward action=accept src-address-list=allowed in-interface=!sit1 comment=“local network”

So I found an example in…
https://wiki.mikrotik.com/wiki/Manual:My_First_IPv6_Network
… that says it should be defined something like this:
/interface 6to4
add comment=“HE IPv6” local-address=194.105.56.170 mtu=1280 name=sit1 remote-address=
216.66.80.90

But I am not trying to build an IVP6 network, so I’m confused as to what needs to be in my first firewall or if I even need to address IPV6.
Can an attacker use IPV6 against the router even though it has an IPV4 address?
Do I need to leave an IPV6 door open in case the ISP ever decides to use IPV6?

2

I commend you for your bravery. I am going to have to buy a large bottle of Rye Whiskey and ask for gobs of assistance to make the transition.

3

Simply disable the IPv6 “package” on the router and you are done. (or just not configure it, it needs some configuration to “accept” the IPv6 “block” of IP-space from your ISP and use it on your own LAN.
There is no danger against hackers, if you don’t run an IPv6 “stack” then your ISP will not provide it to you automagically and there is no danger against any kind of hacking.
Close the door for now, and open/configure it wherever you feel the need and have a good understanding what you are doing.