Have a look at the Expat Arrivals Doing Business in Chile page; it addresses a lot of your questions. Generally businesses are structured in a hierarchical manner rather than a flat structure, so this could be difficult if it is not something you are used to. The working hours are also typically long, although the lunch break in the middle of the day does also tend to be longer than the standard one-hour break common in many other countries.
If you decide to make the move, it would be a good idea to learn as much Spanish as possible beforehand as this will definitely give you a leg up in the business world. But also bear in mind that Chilean Spanish is a dialect of its own and can be difficult to understand even for someone with a background in speaking, say, European Spanish. So the best route would be language classes specialising specifically in Chilean Spanish.
Hope this helps.