Hey man! Cool questions.

1. You order to hire on one turn, they start working the next one, resources processed the next one and subsequent. Correct.

2. Fire a worker now and hire another you will still get the resources from the one you fired because they were upcoming. And you will have the new one start as if you would hire him normally.

3. You can choose one for your (hero) the colonist. You can either choose one tech or perform an action.

4. The "Build" option is if you want to build something with your hero. If you don't have a builder you have to build it yourself. If you have a builder then they'll build. These buildings are completed in 1 turn, but on more advanced ones you get more speed with more builders and you can choose to help them yourself. You'll be notified if a building takes longer than 1 week.

Thanks for the questions Matt... Good for another FAQs post.