The “banner” (slider) is created using the “Layer Slider” premium slider plugin which you received with the theme
If you want to have it , install and activate the Layer slider plugin (if you already doesn’t)
then download the
Home page slider from the link below https://mega.nz/#!xhFQjSrA!8ZviTrv-BQ_Wx0oM2pF1HKZ_DLjgoXdEqD4F7JvfimU
and Import the downloaded file into your Layer slider plugin sliders.
then Insert the Layer slider into your Frontpage. (Your Frontpage needs to be a Static)
Here is a guide on How to create a Static Frontpage
If you do not know how to import it, you can give us your website URL & admin user/pass in private reply and we will import it for you.
Since you said you are the beginner, Here are some good resources if you want to learn to work with WordPress:
Our Knowledgebase is a good start point.
You can visit our Chanel on Youtube too.
I think the easiest way for you, is to create your website using the Elementor Page builder (Which we suggest to install with the theme)
Please check the following links:
I then added it as a Static FrontPage from the Customizing->General->Static Front Page menu. https://prnt.sc/qbwwfs
After that, I have imported a demo slider to the Layer Slider plugin, and enabled the Slider from the Agama Options meta box, on your Static FrontPage. https://prnt.sc/qbwy6d
Now you can select the page where you want to show your Blog posts https://prnt.sc/qbwzu3
If you want to modify the Frontpage Slider,
Navigate to > Dashboard-> Layer Slider WP->Sliders and click on “Full width demo slider”, to edit it. https://prnt.sc/qbx1o7