Thanks for writing in.
In this case, we are not able to assist you with the customization because it is beyond the scope of our support. It would be best that you will contact custom developer regarding this customization.
The only thing that I could do is guide you what to edit in order for you to achieve the customization.
First, you will need a child theme.
Child theme setup guide:
Next read some guide on how to customize
And lastly, customize this file below:
Hope it helps.