Hello @Aleksandra Wierzbicka !
You can write things and not publish them meaning that you press "Close" instead of "Update" when you are editing a page. By pressing "Close" You can save the changes. To find again the pages ,you can see them on your personal icon>Recently worked on with the tag "UNPUBLISHED CHANGES".
For a more sophisticated alternative you can use the App Comala Workflows that allows you to have stages on your document. One of them is "draft" where nobody sees the document except you.
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