You can also drop cache for debugging by running something like echo 3 | sudo tee /proc/sys/vm/drop-caches
But remember that the kernel knows best
this RAM will automatically be freed up when needed and you should never run this except for debugging (or maybe benchmarking).
If your distro can't be forked into a "beginner distro" then it's fundamentally flawed IMHO.
To be clear, I've used Arch as my daily drivers for a while, and while it's not the best fit for my needs (I use Debian mostly), there's nothing that I experienced that was incompatible with a "beginner" distro.