My response to someone earlier today saying they are new to libertarian ideas:

Now do your own research on the intellectual roots of libertarian thinking and perhaps even associated economic ideas.

Perhaps a good place to start:

https://www.libertarianism.org/publications/essays/history-libertarianism

And associated with libertarian thought is the Austrian School of Economics. This is not to say all libertarians must be Austrian School adherents, nor to say all Austrians must be libertarians. But it is safe to say the two have concurrent thought and many people are both libertarians and Austrian School adherents.

The most well know voices of the Austrian School include:

Mises Institute: https://mises.org/

European Center of Austrian Economics Foundation (ECAEF): https://ecaef.org

Austrian Economics Center: https://austriancenter.com

Well known economists like Milton Friedman and George Stigler are considered to be members of the Chicago School of economics and it is also loosely aligned with libertarian thought but diverges on the question of central banks and monetary policy.

Perhaps the most well known concept associated with libertarian thought is the non-aggression principle or NAP.

The NAP is by no means the perfect definition of libertarian thought and does have issues: https://www.libertarianism.org/blog/six-reasons-libertarians-should-reject-non-aggression-principle

However, the main idea behind it drives libertarian thought. Namely, it is an ethical principle that forbids the initiation of aggression. And it flows that if an individual lacks the right to initiate aggression then a collection of people, even a majority of them, also lacks the right to engage in aggression.

Proto-libertarian Bastiat applies this principle to government in his treatise, The Law, when he wrote the following:

The law is the organization of the natural right of lawful defense. It is the substitution of a common force for individual forces. And this common force is to do only what the individual forces have a natural and lawful right to do: to protect persons, liberties, and properties; to maintain the right of each, and to cause justice to reign over us all.

This, to me, is the essence of libertarian thought regarding government. It has no more rights than any individual to act beyond that which an individual can lawfully do.

Have fun going down this rabbit hole.