There are many Gutenberg blocks to choose from within WordPress. To use each of these blocks, add a Gutenberg block and select any of the blocks below from the Common Blocks section. Instructions and specific fields for each will populate as needed for you to input content.
To see a list of blocks supplied by WordPress, visit https://wordpress.org/support/article/blocks/.
For a basic how-to introduction, please see Editing Homepage and Other CMS Pages.
For more information about sidebar options, please see Sidebar Settings.