How to set up my Neatgear R7000P DD-WRT to work with Vodafone FibreX?

I read that I need to set the VLAN tag to 10 but im still unsure on how to do this properly as there is the 'networking' tab which allows you to set the tag to 10 and then the 'VLAN's' tab which has a list of vlan numbers and ports.

Also I am confused about how to get the ISP IP address configured, is it supposed to be DCHP so the modem gives the IP's to the router or do I set it statically?

Could someone please share with me how to set up the VLAN tag to 10 so it works with Vodafones FibreX aswell as the correct settings to pull the IP addresses from the modem please?

Thanks alot