thank you, i read: "Download the latest version of MetaMask for Chrome or Firefox. If you have not used MetaMask before, you will be required to set up a wallet and generate a recovery seed. This recovery seed is separate and is not part of your Trezor and is not necessary if you only intend to use MetaMask with your Trezor."
Since i use metamask years ago, i don't have to set up a wallet?
If it's already installed, and you have a wallet setup and everything then yes, you don't need to setup a wallet.
You could just open your MetaMask, and click on "Account 1" dropdown (or whatever you named it) -> "Add account or hardware wallet" -> "Add hardware wallet".