Golf Shot Allowance WordPress Site

I need a straightforward WordPress site that centres on a single feature: a shot allowance calculator for golfers. The build can be minimal—think a clean home page, a dedicated calculator page, and a simple contact section—yet it must look polished on desktop and mobile.

The calculator itself has already been created via a 3rd party product and will be embedded in the site's calculator page.

Please set everything up on the latest stable WordPress release, keep load times fast, and use only well-supported plugins. Once finished, deliver the working site files (or WordPress export) and a brief note explaining how to add pages and menu items.