It seems that your are using the Creator World Free WordPress Theme
The Creator World is a free WordPress theme build in WordPress customizer whereas the Creator World PRO theme is built in more user friendly Theme Options panel. The PRO version contains lots of sections in home page for creating beautiful and professional website.
To customize the slider in Free theme
Go to Appearance -> Customize -> Slider Settings
- Create the page for slider from wordpress dashboard
- Slider Title manage from page title
- Slider image manage from page featured image (default image size 1375px/560px)
- Then select the pages from dropdown for slider
If you are still getting any problem, you can send your website URL and WordPress admin login details at firstname.lastname@example.org so we can setup slider in your website.