I think for the beginning all are good enough to get you started.. just get it started.. It’s like you made up your mind to start running from the next Monday but stuck on choosing what shoes to wear.. adidas or puma.. especially for the beginner - it doesn’t matter.. just start it

And don’t worry about “outdated”.. most of “outdated” stuff will work with recent version of elixir especially basic language constructs.. And once you are more fluent with the syntax - you’ll catch up on diffs rather quickly.

I agree with @RudManusachi that getting started is the most important step. I started with the official getting started guide: https://elixir-lang.org/getting-started/introduction.html. It provides a concise, straight-forward introduction to Elixir.

Much depends on where you’re coming from & where you want to go. If you’re a ‘beginner’ only to Elixir, but reasonably experienced otherwise (my position a couple of months ago), I’d read very quickly through the official guide, get everything installed, and perhaps work through http://elixirkoans.io/ (very basic and not recently updated but will get you hands-on with the available data structures etc). Then start working on small projects while going through Elixir In Action. The latter book is excellent but (I think) too terse on the fundamentals for an inexperienced programmer.

If you’re primarily attracted to Elixir because of Phoenix, it might be most motivating to jump early into Phoenix, and then go back later to fill in the gaps in your Elixir knowledge. In that case I think the official guides & module docs are easily enough to get some small webapps going. For a quick look at LiveView, the free portion of the Pragmatic Studio LiveView course is teriffic.

You might enjoy reading through Saša Jurić’s (Elixir in Action author) post on how to approach learning Phoenix.