Doing business around the world is pretty much the same. You have laws to follow for how you conduct business and for registering your business. I saw an opportunity to start a company in Singapore, so I looked up company registration in SG to find out what I needed to do to start a corporation. I knew how to do it in the States. It is pretty much a straightforward process in all the states. I had no idea about setting up a corporation in Singapore. I learned that it is pretty much just as easy to do there as it is to do it here.
The reason for making a company a corporation is to limit liability. Anyone can be sued, and corporations are considered entities that can be sued. You want to have a corporation for a business where you do not want your personal assets liable. In most cases someone who litigates against a corporation can only win awards based on the holdings of the corporation.