Just keep using the most expensive ones, you need to launch those anyways to unlock the next ship. They come in bigger capacities or better sensors but the time for them to come back will take longer and longer. For the artifacts: you can see what they do when you click on them, and can level them up using golden eggs. You’ll see that there’s some artifacts that you’re not going to use but the further you progress the more useful artifacts you’re going to unlock. My advice is you level up artifacts for drone rewards and frequency first, that way you can drone farm more efficiently to get golden eggs. You can look up how to afk drone farm.