In this series of educational videos (so far available only in German) you can learn everything you need to know to get started with of Bitcoin.
More information (in German) here: www.privatekey.biz
Episode 1: Why do we need Bitcoin?
Episode 2: Public and Private Key
Episode 3: What is a Blockchain?
Episode 4: What is Mining?
Episode 5: How does a Wallet Work?
Episode 6: Buying Bitcoin
Episode 7: The Lightning Network