I couldn't start writing and compiling my own source files until I went through all these unofficial channels to get stuff set up. I might be misremembering about the actual tutorial itself, but step 2 (do your own project) was literally impossible without the detour.
This is even worse than how it is for Python - which does have a similar problem - because at least in Python's case you can "just run" your scripts up until the point where you need dependency management and packaging. You can't even execute a .clj file (as far as I know) without going outside of the official resources.
I'm not sure how they can make it easier than what it currently is, no need for any unofficial channels. If you follow the guide at https://clojure.org/guides/getting_started to install Clojure, you'll end up with `clj` in your `$PATH`, and then it is as easy as it is with Python, unless I misunderstand what you mean.
$ clj --version
Clojure CLI version 1.10.3.849
$ echo "(println \"hello world\")" >> hello-world.clj
$ clj hello-world.clj
hello world
This is even worse than how it is for Python - which does have a similar problem - because at least in Python's case you can "just run" your scripts up until the point where you need dependency management and packaging. You can't even execute a .clj file (as far as I know) without going outside of the official resources.