This is Elias with Shopify Support. Thank you for reaching out.
I understand you're looking for a way to make the Image with text overlay clickable on your homepage. The Image with text overlay section does come with an option to add a clickable button, which can be directed to another page on your store or to an external website. However, if you'd like to make the entire image clickable, this is something our Theme Support team can help you with through a customization request. As part of our design policy, and if your store is subscribed to a plan, you're eligible to use the complimentary design time on customizing your theme.
We're no longer able to create customization requests through the Community Forums, as we've since updated our authentication process. While we're not able to provide account-specific support via the Shopify Community at this time, we can help you send a customization request through live chat, email, or callback. Please visit Shopify Help Center and log into your account to create a support request.
On a side note, we do have a step-by-step guide for making the slideshow images clickable - Tutorial: Making Your Slideshow Clickable. Let me know if this is something that interests you?