To start using the Inster plugin, add a one of Inster block to the page.
Step 1
Open an existing one or create a new Page/Post
Step 2
Add a new Inster block to the page. Click the Plus Button at the top T

Step 3
In the list that appears, start typing Instagram in search form, and then select the appropriate block.

The block will appear in the editor. Next, go to the block configuration.