Learn Spanish (Latin America): Yo como una hamburguesa en el restaurante.

No, you can just say Como una hamburguesa en el restaurante. In Spanish, the verb ending usually tells you who is doing the action. The -o at the end of como already means 'I eat'. Adding Yo just adds a little emphasis.

The word hamburguesa looks like English. Is the 'h' pronounced?

No, the 'h' is completely silent, just like in almost all Spanish words. You pronounce it starting directly from the 'a', as if it were spelled 'amburguesa'.

The English translation says 'at the restaurant', but doesn't en mean 'in'?

The Spanish word en is very versatile and can mean 'in', 'on', or 'at'. When talking about being physically present at a location, en el restaurante translates perfectly to 'at the restaurant' or 'in the restaurant'.

Why is it una hamburguesa and not un hamburguesa?

Because hamburguesa is a feminine noun in Spanish (notice it ends in 'a'). Therefore, it needs the feminine word for 'a', which is una.

This lesson is about using estar for locations. Why isn't estar used here if we are at a restaurant?