My site is still under construction so my main page I would like to change it to a under construction page but remain the header and footer. I tried creating a page and some content and edit the settings to load a static page for homepage but it didn't work like how normal wp themes work.
I am really sorry to say that what you are asking for it is customization. We do not provide support for customization. We only provide support for our built in features, Configuration and installation of our product.