Hello Sir,
To set slider, You have to go to Dashboard >> Slider –> Click on Add New button
1. Add the slider name.
2. Add the slider text.
3. Select slider button link to page
4. Add featured image for slider & click on publish button

To set slider text colors & text display setting: Go to >> Dashboard >> Appearance >> Customize >> Home section >> Slider section

Here are documentation links to set slider:
https://luzuk.com/demo/nataraj-dance-studio/documentation/assets/images/add-new.jpg
https://luzuk.com/demo/nataraj-dance-studio/documentation/assets/images/slider-name.jpg
https://luzuk.com/demo/nataraj-dance-studio/documentation/assets/images/slider-button.png
https://luzuk.com/demo/nataraj-dance-studio/documentation/assets/images/publish-slider.jpg

if you need any more help, please message us.

Thank You.