Desperately need help with xScreensaver

Can anyone help? I have a Raspberry Pi 3 with Bullseye OS installed. Cant seem to find a definitive way to install it and get it working? I work for a small charity and all we want is a slideshow of images playing on our TV in the window on a loop. I've tried LibreOffice Impress but it seems to cause no end of problems for the Pi. I guess because it cant handle the graphics? Thanks so much!

Use this https://pipresents.wordpress.com/hints-and-tips/tutorial-adding-gpio-to-a-radiobuttonshow/ Or this https://www.ufie.de/en/raspberry-pi-as-slideshow-digital-signage-server/ Apparently you can't use your own images with xscreensaver...

Export the impress presentation to a HTML and use firefox in kiosk mode.

Will this lag or freeze

That will highly depend on the images size