Transferring matic on the ethereum network.

I want to transfer some matic to my coinbase which only accepts ecs20 matic. I have some esc20 matic (on the ethereum network) on my metamask wallet but i am not sure how i can transfer that to my coinbase. Can someone tell me how i can do that on metamask?

Also, does it cost more to transfer matic on the etc network compare to eth?
I get the message that I don't have enough for gas fees even though i have eth.