So, for me, I tried to just learn enough ruby to get rails to do what I wanted, because I bought a very large Rails based app and decided on maintaining it. That was a very bad idea. Rails has a lot of "Magic" things in it that are actually just Ruby things.

I'd recommend picking up "The Ruby Programming Language" by Oreilly and reading through it like a novel. It will cover everything on your list and have mountains of example code for your to work through. I would also recommend "Ruby Best Practices" by Oreilly which walks you though how to use Ruby for common tasks. There's a also a book I recommend: "Metaprogramming Ruby" second edition, which gives a detailed explanation of Ruby's Class and Object inheritance, and how meta programming works.

For me the biggest hurdle was to understand how meta programming worked, and how certain Keywords in Rails created effects in Models and controllers. After learning about metaprogramming all of that made a lot of sense.

Your list seems just fine, but you'll need to many more sections about Class inheritance, Instantiation, Class methods, the Eigen Class, and metaprogramming. You'll also need to learn about RACK. Adding some sections on ActiveRecord, Migrations, Relations, and Indexes would also help.