Network.socket.connection NFT cardano-cli install

Alex Thank you very much, indeed im using that guide the cardano documentation, and im using these youtube video
As you can see he just type:
cardano-cli query tip --mainnet
and get all the information, but Im not sure if it is necessary to create a pool in order to create the NFTs

I already have those files in : cardano-node/configuration/cardano

Don I need to put them in another place? To restart the node is killing the cardano process an then open it again with the comand cardano-node run?

I follow this forum as well Cardano-cli: Network.Socket.connect: <socket: 11>: does not exist (No such file or directory) - #7 by Tuan_Lam
And Im pretty sure I have the PATHs already well defined.

Is there another possible thing to do? Thank you again @Alexd1985