AS you are not so skilled in web programming, I would look into Bootstrap.
Bootstrap is a framework that uses the concept "mobile first", which might be of interest for you.
Bootstrap has something called a Carousel that might be what you want.
Bootstrap Carousel[
^]
There are also various addons to Bootstrap that might be useful, for example
Jssor Slider[
^]
However, depending on how your HTML code is written it might not be feasible to introduce Bootstrap in your existing design, but as the link to the web site you refer to is missing it is difficult to give any better help.