Carousel Header with custom content boxes

Hey everyone,

I would like to design an own header within docebo. I think about a carousel with three custom content boxes that I can slide. Is this possible? I just see code for normal image slides, but not for custom content boxes.
The header carousel should span the entire width of the screen.
Would be happy to get some Code, I have absolutely no experience working with CSS unfortunately...

Thanks in forward!
Annika.