Starting the Sentry Wallet is required to be able to accrue node rewards.
Starting the Sentry Wallet when using the desktop app is as easy as a click of a button.
When the Sentry Wallet is not started (it will said "Paused"), there are 3 buttons that say "Start Sentry" which you can click to turn it on (clicking only one of these buttons is sufficient).
If you do not already have a wallet and need to create a wallet to designate as the Operator, you can do so using .