Once you have created a local account, go ahead and grant it some orain tokens in your chain's genesis file. Doing so will also make sure your chain is aware of this account's existence:
By default, the genesis file do not contain any gentxs. A gentx is a transaction that bonds staking token present in the genesis file under accounts to a validator, essentially creating a validator at genesis. The chain will start as soon as more than 2/3rds of the validators (weighted by voting power) that are the recipient of a valid gentx come online after genesis_time.
A gentx can be added manually to the genesis file, or via the following command:
Run Testnet
Now that everything is set up, you can finally start your node: