Follow the below steps to create the account in weebly.
Step 1: Login to UCP.
Step 2: Go to “Application” menu and select the “weebly” in the sidebar of the home page.
Step 3: To create the weebly account select the domain and click on the “Create” button.
Step 4: After creating it will display in the “Current Weebly Domain List” at the right side of the panel.
Step 5: Click on the “Edit Site” button to login into the domain weebly account.
After login it will display as in the image below.
Select the theme and start building the website.