Eh, long time lurker, first time poster, I’ll try to explain to the best of my abilities.
As for guidance, after you fixed up your starter ship and take off, you’ll get a series of transmissions that lead you to certain coordinates. Follow those to unlock the basic recipes required for progress (i.e., hyperspace fuel cells) and the anomaly, which is a summonable (multi-)player hub. This is also where you can obtain the stuff from your twitch drops.
Afterwards, there’s two main paths, the artemis path, which is the revamped tutorial/campaign and covers most of the game mechanics, and the atlas path, which used to be the main storyline before all the revamps and addons. You’re not required to follow those, but if it’s your first trip, I’d recommend doing them. The story is pretty good, even though the delivery is a bit pedestrian.
Twitch drops (and quicksilver unlocks) are account bound and can be obtained once per savegame. So, if you start a new game, you can get them again, but it you already grabbed them, then that’s it.
Expeditions are seasonal events, basically putting a twist to the common game progression, while also pacing up the progress. You get an alternative start scenario, and a list of tasks required to progress to the end. Fulfilling these tasks usually give you ample rewards, with each major milestone providing an account-based unlock, usually for some cosmetic items like posters, starship trails, new bits and bobs for your avatar, and/or unique starships or companions.
Expeditions are time-locked, meaning they’re not permanently accessible. Hello Games did a re-run of 4 of them last winter, and IIRC there’s a new expedition running as I type.
I should mention that these require some familiarity with the game’s mechanics. They’re for older players looking for a new experience, and are somewhat unsuitable as a starting point due to the lack of hand holding in regards to mechanics.
All in all, it’s just cosmetics. On PC, there’s a save editor that can be used to unlock twitch drops and expedition rewards, on playstation, well, you’re missing out on a few cosmetics.
In regards to copper: For the big metallic “puddles” you need to use the mining function of the terrain manipulator mode on your multitool. The tool should either come pre-equipped with one, or the game will hand you a blueprint to build the module.
That said, the game is about the vibe for me. Yeah, I’ve probably seen it all before. And with the kind of gear you amass after a while “normal” mode is pretty chill, and the mine->process->recharge cycle is toned down to having to recharge my gear about once or twice per session.
But there IS something wonderous about breaking throug the atmosphere of a pristine world, soaring along the coastline, setting down the ship and enjoying the view (and maybe snap a few pictures). It’s relaxing. It’s colourful. It’s my little refuge from the mad, mad world I have to deal with on a daily basis. At least occasionally.