Again +1 on Exercism.org.
As others said before, the official tutorial and the “Elixir in Action” book are really good ways to get started. Exercism.org then allows you to do exercises, submit them, and get feedback from real people (mentors) which will help you a lot with learning best practices and wrapping your head around the functional paradigm.
If I were you, I’d take a look at the official documentation, start with a toy project, maybe look into “Elixir in Action” if things don’t make sense, and then deepen my understanding through Exercism.org.
If you ever feel super stuck, shoot me a message! I’ve been writing Elixir for a living the past 5 years.