I switched to polygon network for mining / Metamask / Best way to turn WETH into USD?

Hey guys, basically the title. because of the eth gas fees I switched over to polygon. Usually I would mine eth and send to coinbase pro, sell, cash out.

But now with WETH I'm confused about the whole process to cash out to my bank really. I'm probably just really dumb. Can someone link a guide or tell me the easiest way? If I could keep using coin base somehow that would be great. Also, when I try to change weth into something coinbase supports, it says I don't have enough matic?

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Thanks in advance guys.