I obtained this the day after a woman visited my workshop first thing in the morning. Her name was Dana and asked if I would like some Ore. After saying yes, the next day I was given a few diagrams and *bloop* I was about 6 months into the game by then. I had recently built the hot air balloons. I don't truly know if this is missable or not, because she did have an option to decline her offer.
If this achievement doesn't pop at the same time be sure to:
- Check all the shops for green books and consume them from your inventory. (If these even apply)
- Any time you can, always be researching with Petra. Eventually she'll stop giving you the option and start directing you toward the till. This is when you know you've gotten everything you can from her.
- Story missions and such sometimes require you to build a special something or other. EG a water wheel for a section of the island. The mission generally provides you with it, or tells you to go see Petra. (The latter is not the same as normal research)