In my head libertarians are the right and anarchists are the left but they are similar in ideals (little to no government intervention). At least in the sense that if you talk to a libertarian I feel they tend to sound socially right and an anarchist tends to sound socially left. I have no idea if this makes sense at all. If you’re going to tell me to read more, sure, recommend some literature though.
More clarity: modern libertarian was revived in the 1970s and blew up in the 1980s and it took most of it’s core thought from classic liberalism, but considered itself a more ‘pure’ form because it takes a more extreme take on the premises of classical liberalism.
Basically libertarians came from people who thought classical liberalism wasn’t extreme, or ‘pure’ enough to be a proper ideal theory from which to create an ideal society. They key figure in this is Robert Nozick and book Anarchy, State, and Utopia, 1974, which he wrote as a response to John Rawl’s 1971 A theory of Justice. Both are considered founding texts for modern political philosophy and political science. Rawl’s work is more in line with classical liberalism, but has socialist leanings, which pissed off people like Nozick, because libertarians thing socialism is bad. Rawl’s book was massively influential, far more so that Nozick’s work was.