I heard there was hourly-luggage storage available at the Central Station, is it this: https://luggagehero.com/ or something else?

I dont think so... but its in the corner https://cdn.discordapp.com/attachments/1382746120559530124/1382749499734228992/image.png?ex=684c4952&is=684af7d2&hm=eda602f360d2218ab1d808d8c3be4f004f17c759d89f2d6a662ec9abd56b2ca3&

Ah, I found more info: https://www.visitcopenhagen.com/copenhagen/planning/basic-need-know-information

That's the one! It's in the basement of the station! There should be signs, if in doubt, do ask around.