I've create a multisig wallet with electrum once... only to test it out myself tough... Worked like a charm

I don't remember which tutorial i followed, but a quick google found this one: https://www.deepdotweb.com/2015/03/21/multi-signature-transactions-electrum-2-0/
Altough i haven't used this tutorial, it looks about right... If i remember correctly, those were the steps i took myself to test electrum multisig.