Learn Liberty is an excellent website and YouTube channel that breaks down libertarianism into digestible chunks.
Where do rights come from? Prof. Aeon Skoble claims that there are several types of rights that come from various sources. For instance, voting rights and contract rights come from the legal system. Moral rights are the most controversial, with disagreements about their origin. Fortunately, despite these differences of opinion amongst classical liberals, the various theories of rights are similar in practice.