Building Qt - More information than I got from the docs
Qt Creator was going on longer than 1 hour for a build of the software, so I decided to not pursue Qt Creator. I have an idea that open source is one where you are able to hack-on, adjust, and compile the software yourself within a reasonable amount of time. For an IDE, for the first time using it, longer than 1 hour (and 1/4th done) is not within that idea.
Steps:
git clone https://github.com/qt/qt5.git qt6
mkdir qt-build && mkdir qt-install
cd qt6
git switch 6.9.3
cd ../qt-build
../qt6/configure -init-submodules -submodules qtbase
../qt6/configure --submodules qtbase -prefix ../qt6-install/
cmake --build . --parallel 4
cmake --install .
Remembering that qmake is within the qt-install directory, bin directory:
You should now be able to proceed with the "Getting Started at the Command Line" tutorial the Qt wiki has: Click here
Note: there is nothing special about the directory names I chose, you can choose any, you can also probably move the bin, include, and lib to other more accessible locations if you so feel.