Use the map actively to note down everything, big trees, different stones, warm/cold/rain areas, prospecting later on too, is very helpful. A fully fledged out map saves a lot of time later.
First order of business as in any survival game is food then shelter. Berry bushes can also be picked up.
If you find copper bits on the surface, dig down :)
Made me delve a bit, the logical conclusion i came to:
it seems to be evolved from
https://en.wikipedia.org/wiki/PSX_(digital_video_recorder)
to https://m.emuparadise.me/Sony_Playstation_Emulators/Windows/PCSX/18
to
https://en.wikipedia.org/wiki/PCSX-Reloaded
and https://en.wikipedia.org/wiki/PCSX2
There is no mention on their page about it though. https://rpcs3.net/about
So an initial word play on PC and PS merged into PCS later added reloaded?