Notion itself has a pretty helpful Guides and Tutorials page for getting a better understanding of the major functions like databases, the import and export functions and backlinks. However, if you’re just looking for some quick guidance on creating and editing pages, below are a few easy getting started notes.
As a general guide - text in Notion is split into blocks. Every time you use the ‘enter’ or ‘new line’ button on your keyboard, you create a new block of text that you can format in a variety of ways. If you are typing a paragraph of text and do not use the enter button, the text stays as one block. For example, this is one block of text. However, if I use enter to go to the next line
This is actually a new block of text that I can format independently from the text above.