Store pick up

Thank you for explaining this. 

I followed your description above, copied the code into each file as you specified,

However, I get a Read more button, and when i click on Read more nothing happens. The text does not expand.

You mentioned "add button  to product description.." I am not sure how to properly insert the HTML to the product description. 

Below is my product-template.liquid file: 

Could you please highlight where in this section of Product desc I should add the HTML

Your response is highly appreciated as I have tried to fix this issue for weeks!