I looked it up, and you're actually right! I just saw it was a type of milkweed, so I wrongly assumed it wasn't - thanks for pointing it out! Lemmy allows title edits, so I'll fix that right up :)
Not particularly juicy, no, but turns out it is a succulent after all, so it's all good :)
I just love weird looking plants and bought it on impulse since it looks like something from a different planet - hope it feels at home with all my cacti and euphorbias!