Create page template and add sections

Step 1: Go to Online Store -> Select Theme -> Customize.

Step 2: Open the drop-down menu at the top of the page. Click on Page then scroll down to bottom and click Create Template.

Step 3: Add template name and select base template.

Step 4: Go to Online Store -> Pages -> Click Add Page.

Step 5: Add page title and select template ( You need to select template which you just created in previous steps) then Click Save.