Hi JanoschExe, thank you for playing ABYSS!
Gold can be obtained by selling junk items that your companion finds during expeditions. Keep sending your companion out, and they'll bring back various items you can sell.
This game does require some patience — it's designed to be a slow, relaxing experience. Please take your time and enjoy the journey at your own pace. :)
Also, I've recently added a tutorial expedition for new players. If you'd like to try it, you can reset your data from the settings and start fresh. The tutorial will guide you through the basics in a short expedition.
Happy exploring!