Hello, Yaco!
It’s pretty simple to set-up a slider that is able to be edited from the Webflow CMS.
I put together a 7min long video of how to set this up really quick from scratch without using any custom code.
Hope this helps 
Screencast Video:
Preview Link to CMS Slider Example:
If you have any other questions for me please reach out on my creative agency site svz.io