Oh and they are not just different names. There are literally thousands of different hybrid strains of cannabis, each has it's own different look, flavor, and high to experience. But in general a higher Indica strain will usually give you a more body, narcotic type high, where as a higher Sativa variety will give you a more head type uplifting high. This is just a rough explanation, it will take some time to distinguish between them, with you being new to it. A lot of people don't even realize that there are different types of highs in the first place.