There is a notepad facility inside the game.
This is available from the notepad icon on the bottom blue bar of the game. Please note you MUST save the entries each time you update them and you can rename the tabs using the ‘Rename Tabs’ option at the bottom of the notes window.
Those who do really well in CE tend to keep a pad and pen next to them, taking notes in the early days of where they have been and important landmarks they may want to check out later. It’s not compulsory, but CE is not the kind of game you’re going to master in a day and complete in a weekend.