Now, when you start, you will be in a city. Although you can sample for resources in a city, its kinda laggy, and staring at a building gets boring. So head outside and hit the dirt. (or slime, grass, or sand, or whatever the local terrain happns to be made out of.)
Now, open up your datapad. Hit the tab that has your schematic listing. You will see nice little pictures of everything you can craft at the moment. Pick one. For the purpose of this guide, lets make some Bofa Treats. (Mmm...bland...)
As you can see, they require:
8 Cereal
3 Organic