I have not taken the PE and am not familiar with if you need to know all the methods, but if I were given a choice for an indeterminate structure, I would use moment distribution in most cases. It's in the easiest and fastest. Understanding slope deflection is probably a good thing too. I...
If you want to get into land development you should just get a general civil degree. Also, in structures you really need to get a Master's degree. It's not mandatory, but highly preferred.