Important
Account is associated with only one node, so for creating 'N' nodes, you need 'N' different accounts
You can check this document for more details of account creation.
Below is the way one would generate an account on CLI.
$ docker run -i dhiway/cord:develop key generate -w 24 -n cord
Secret phrase: climb extend beyond thing romance eyebrow double ocean knee rebuild under cat spare equip furnace manual play million frame spatial double boring crop else
Network ID: cord
Secret seed: 0x1ef83609b52ffb52e926c10a2cb0e08d75d52698597c4f4da65ae872e38a4523
Public key (hex): 0x76e64f8bd771044f3c1b4bde24b93bd140184a20d9aa631da85b8c9348f17637
Account ID: 0x76e64f8bd771044f3c1b4bde24b93bd140184a20d9aa631da85b8c9348f17637
Public key (SS58): 5EkbvZ2xdbAzhZKs154UrnYPp6hffq4FJ7xvZ58HWMLvvec3
SS58 Address: 5EkbvZ2xdbAzhZKs154UrnYPp6hffq4FJ7xvZ58HWMLvvec3
Notice that every execution of the above command would generate a random key. It is very crucial to store the information in a secure way for future use. Specially the 'secret seed' from the above command, so one can generate the same keys in any machine/application of user's choice.
One can install Account management browser extension which helps in managing the accounts on the laptop. Import the account created from the above into extension here using the steps mentioned here