1. Create a new page in the backend called splash
2 set it as your homepage
3. make the large background image the background for the page
4. put the two clickable images inside a div and wrap them in anchor tags.
5. Use CSS to control the positioning and margins.
All very basic HTML and CSS
Learn for free here https://www.codecademy.com/catalog/language/html-css
If you use WordPress you need at least an understanding of HTML and CSS
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