Hey James! 

You can create a new page and add a form by following these steps:

 Go to your website and enable Edit Mode / Click any header title / From the editing options, select "Add Menu Item" and create a new page

Check out the documentation:

📌 Odoo Documentation - Menus & Pages

Once created, you can choose the Landing Page category to simplify your design process.

Hope this helps! 

Edit Menu

Create a Landing Page

Select the Landing Page and customize it