You can easily add a page and install the store application from the application list
First, create a new page by clicking on Settings, then adding a subpage
Name the page whatever name you want, for example, the store
Now the page has been created successfully, but you need to install the store application within this page
Click on Add Content from the left menu, then Applications and choose Shop
And click Save
By default, three products will be added
You can delete or modify any of them, and you can also add more products
The store page is now ready for you
Do not forget to add an appropriate description, pictures, the special price for each product, whether it includes tax or not, and other important information that will help you attract your customers.