May I ask why you, as a beginner, specifically chose one of those distros instead of more “mainstream” ones?

Puppy Linux’s main use-case is to be a live ISO, that doesn’t need to be installed to run. It doesn’t mean it’s not a good idea to install it, but I think if you want to use an Ubuntu derivative, there are better options for a beginner like Pop or Mint that would let you install a lightweight desktop environment like XFCE, LXDE, LXQt and so on.

Alpine Linux is specifically designed to avoid all the core system tools that are pretty much universal on most other distros like glibc, systemd or GNU tools and libraries, which will make your life hell as a beginner if you need to troubleshoot anything as most “universal” documentation like the Arch wiki would be at best partially relevant, at worst useless.