Keep doing what you love, just make it secured.
Cipher stores what you tell it to and keeps it locked. The only way to unlock is to know a number that has value to you.
For each note, think of 1 to 4 digit number that only you know the meaning to, and use it to reveal the contents of this app.
iCloud will make sure that the notes you want to be synced will be stored on all your devices.
Never forget one more thing with Cipher.