Thanks for the instructions. I succeeded in creating a cold note. My VPS is successfully synced. But when I launched the masternode on a local wallet, after 17 hours I still see the watchdog_expired status. After restarting the wallet I see status enabled for a few minutes and then it changes to watchdog_expired. But in the "Last seen" column, the time is updated every 10 minutes.
Now I do not know if I have it properly set up and I can only wait for a reward.