How to transfer songbird to metamask

Can anyone help me, please? Once I have connected my Ledger Nano X to Metamask, I go to the Import account and enter the string of my private key, I get the following message: “Cannot convert string to buffer. toBuffer only supports 0x-prefixed hex strings and this string was given”. Also, when I go to the “Connect to a Hardware wallet” option, it asks me to choose an account, but my SGB wallet (that shows os SGB Explorer) is not there. So, I am not able to choose an account to bring my SGB to Metamask.