[IBMiOSS] Python, ACS, Open Source and MKDocs

So I'm beginning down the road of installing the MKDocs package that Richard mentioned a few weeks ago.  I managed to stumble my way through getting the latest version of IBM i ACS (not happy with that process at all, but I digress).  I started the SSHD server, and ACS magically downloaded and installed a bunch of open source goodies.  But I see Python 2, not Python 3.    So I went to the Available packages and I saw python3, as well as a whole suite of what I can only assume are python3-related packages.  I wanted to start with the minimum, so I asked it to install python3. Everything went smoothly (I don't like that I seem to have to X out of the installation progress window, but that's a nitpick). The package is installed.  However, when I run python --version, I still see Python 2.7.16.

So what does that tell me?  Is there additional configuration required, or should I just continue on with my journey?  I'm just concerned that I need other things for MKDocs to run, but I also don't want to download the entire 500GB of additional python3 stuff if I've already hosed things up.

Any guidance would be much appreciated.

Thanks!