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Broadcasting is a very broad field that stretches from Radio and TV to other subgenres of internet videos, etc. The best way to learn about it is to google whatever field of broadcasting that you want to get into.
Once you've narrowed down what you sub-field of broadcasing you want to work in, then you can figure out the best path of achieving success in that area. Most likely it is either getting a college degree in that field, figuring out how to do it yourself if you can teach yourself, or apprenticing yourself to someone experienced in that field.