I have trouble accessing

My service provider has told me that I have to make a trunk and access port to access internet. My question is should I have to tag the eth1/WAN with VLAN? I am not on VLAN small network I have only 5/6 computers and 2 AP.

I want to know the simplest solution possible. Please help.
Local LAN is in default IP 192.168.88.x

If you want any more details please let me know.