need to know my DNS servers

Hi there. trying to port forward to get a stable connection to rockstar games (red dead online, PC/steam) as it is now it is sometimes completely unplayable, dont think it is because of my connection speed i also play other games on the ps4 and have no internet issues, my understanding is that some people are having a bad connection between their ISP and rockstar servers and port forwarding can help with this, currently following a guide and ran into a step that requires the DNS servers, usually you can find this in windows with command prompt but they are listed there as the IP for my default gateway, a warning was given in the guide I'm following that if this happens it isnt the correct numbers I'm looking for and I should log into my router and look up the right numbers on a status or settings page. however with this particular router (huawei HG659) that info isnt really simple to look up, I clicked on the “internet” tab in my router settings and there is multiple boxes with differing dns server addresses and I'm just looking for a primary and secondary, but there are 2 sets in 2 different boxes and the addresses differ too, so I'm confused as to which set i need or if these are even the numbers I'm looking for. Alternatively the guide also stated my ISP will be able to tell me the DNS Servers, so I guess thats what I'm really asking here haha.