How to add homepage image slider and social media icons

I am completely new in the field of WordPress themes, so I am going to make my first website. I downloaded the free Catch Revolution theme.

I have three minor questions:

– If I look at the demo, I see the homepage has side icons on the left side (insta, facebook, etc.). I cannot find where I can add these icons. Does anyone know where I can add these in the customizer?
– in the Demo, on the right hand-side you see 01 – 02 – 03. How can I add multiple slider images on the homepage?
– How do I add a button “view more” on the home page?

Thanks!