First, ask the future wallet co-signers to share their signer key with you. Here is how they can do it:
- Make sure you are using the latest version of Ready Wallet. Ready Wallet is available as an extension on the Chrome Web Store, Microsoft Edge Add-ons, and Firefox Add-ons.
- Open Ready Wallet and go to the accounts list
- Click + and select Multisig account > Join existing multisig
- Copy your pubkey (it does not grant access to your Ready Wallet, so it is safe to share with your co-signers) and send it to the account creator
Once the account creator has collected the pubkeys, they can create a new multisig and add these keys as co-signers.
After the multisig account is created, you will need to activate (deploy) the account onchain before you can use it for transactions.