Dear employer,
i have read your project requirement, to implement new feature to bigcommerce themes, i find 2 point list you write in project description, to add instagram plugin, live chat, hover, change layout and change layout of your website
These changes is minor changes, so we can add this feature safely without remove or bother another function, so i will let you know if all of these changes will not really affected to website functional
I will help to made these changes and implements it into your site, for consideration, please take a moment to see portfolio and review in my profile page
Thanks :)