For constitutional and public-law foundations, start with The Rule of Law by Tom Bingham. For civil liberties and state power, On Liberty by Shami Chakrabarti gives a rights-focused route into legal argument.
If you want legal doctrine connected to history, East West Street by Philippe Sands links international criminal law to a narrative about genocide and crimes against humanity. For questions about law, gender and justice, Eve Was Framed by Helena Kennedy introduces institutional bias in the legal system.
For lectures and video, use the official LSE Law School channel, the The Supreme Court of the United Kingdom channel and the official LSE channel.
For audio, RightsUp is useful for human-rights law, LSE iQ connects social-science research to current questions, LSE Public Lectures and Events gives access to talks across law, politics, economics and society, and BBC Radio 4’s The Law Show gives accessible legal discussion for a general audience.
For structured study, Starting with Law is a free introductory law course, A Law Student's Toolkit introduces law-student reasoning, and LSE Law School Events lists subject-specific talks from LSE Law School.