Could you please provide a step by step guide for CLI beginners?

[Ph15]

Hi!
First of, thanks a lot for digging into this challenge and bringing up a solution.
I am quite new both to Linux and to CLI. I'm running Fedora 40, and have made sure I have installed dependencies (C++, cmake, Fuse).

I have carefully read the instructions given on the tmfs page, but don't understand quite well how it works...
Would you mind adding a few explanations lines on how to proceed?

1. Plug my Time Machine backup drive.
2. Install (what?), following these lines:

mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=/usr/local ..
make
DESTDIR=install-test make install

Here I get an error message:
CMake Error: The source directory "/home/philipb/build" does not appear to contain CMakeLists.txt.

3. Open Terminal, then enter: mount /dev/sdXX /mnt/hfs-root? (In my case, i put sda2.)
   Then I get:

mount: /mnt/hfs-root: fsconfig system call failed: /dev/sdXX: Can't lookup blockdev.
       dmesg(1) may have more information after failed mount system call.

If you believe it is too long to explain or not a suitable method for beginners, let me know, I can understand!
Cheers!