I have a hardware wallet, a seed, and a specific private key.
I want to create a 2-of-3 multisig using these 3 items. So the only option left is the option of creating a multisig using just private keys, but it's only available on bitcoin core, I'd like to do this without having to download the entire blockchain, and be able to spend it easily in the future. Electrum doesn't allow me to import just a private key, then there's the issue of getting it out of the hardware wallet. How can I do this?