There is a whole lot more to learning how this game works and how to play it enjoyably.
It might only take a few hours to mine the materials you need to build a ship but that's once you know what you want your ship to be able to do and you have decided that's what you want to do.
Learning how to use the Markets, the RDMS, exploring Alioth, doing tutorials, all take time.
This game was completely new to me when I started.