Thanks. This is what I could make it look like:
This is just a mockup. You can let me know the color you'd like. I can send you instructions but it is a bit confusing. First you'll need to add stylesheet to your theme code. Then link this button to the collections page and if you'd like to change the look of the button, you'll need to add CSS.
It is kinda 10 minutes of work if you are ok to provide me access to your store (of course, no cost. Just saves time).
Else, let me know. I will follow up with step-by-step instructions. Its just that making instructions would take more time than actually adding the button.
Let me know.