can you tell me the differences between libertarianism and objectivism
I can. American right-wing propaganda machine redefined the word "libertarian" for clueless Americans, to suit their agenda.
Which is why the word "libertarian" only means what you think it means in America, and only to a small subset of heavily indoctrinated, mostly young and white, mostly males.
By the way,
learn about your beloved Ayn Rand.