Any IT-Experts? !

I have now gathered information on my router which has been provided by my ISP. I know that my ISP does not offer help with port forwarding, which means, that if their customers wants to port forward their router, they will have to do it themselves, and their ISP wont provide any help.

I was refered to the company of the router Netgear and was informed by them that I would have to ask my ISP since the genie is completely different from a router provided by the company itself, and a router provided by an ISP, because the ISP changes the genie.

genie is the website of the router, in case you didnt know.

so, my question here is, how can I port forward my router which has been provided by my ISP, and my router model is Netgear CG3000

any help is appreciated