I think you are misunderstanding how Bitcoin works. Confirmations only happens when miners include your transaction into their block. Once you get a confirmation, the subsequent blocks will result in an additional confirmation each. The number of nodes you have doesn't matter. Nodes do verify your transaction but that isn't a "confirmation".

Of course, you can configure nodes into a circle to isolate yourself from the mainnet. But there's no use for that if you're looking for confirmation.