No worries, i hope it works for you! Perhaps its a worth open source program if its not already created. An electron app that takes urls and a timeout value and then just cycles through.

So i had this same requirement 4 years ago. I wrote a small python script that used selenium to open chromium and cycle through tabs https://github.com/RemakingEden/ski-lodge-tv-slideshow/blob/master/skiLodge.py

Don't judge me on my 4 year old code, Im sure that it is awful but it did work then, perhaps you could try something similar?

Really interesting read. Did you see that cyberwire and CSO perspectives did a podcast series on first principles in cybersecurity? https://www.recordedfuture.com/podcast-episode-241 . Its a little less low level but really inreresting.