Build various open source crypto wallets on Debian/Ubuntu.
BlueWallet hot with AirGap Vault cold. BlueWallet supports MultiSig.
AirGap Vault supports using with MetaMask
Put script to your $HOME and chmod +x ./scriptname then ./scriptname to execute, code is pretty self explanatory. I recommend getting a new Debian virtual machine on your PC. Rent a cloud/VPS is your second option given GB+ download while building.