This is a (very) modified version of my original question, for more context regarding some of the answers you might want to see the edits below.
I am learning German for fun, and I do not feel the need to restrict myself to Standard German (the standard which is spoken in Germany). I have found that there are three standards for the German language Austrian German, Standard German, Swiss Standard German. I have been using the website TVoepdia to watch Television in German. I because I only understand at this point about 30% of what I hear, it does not bother me to switch between Austrian, German, and Swiss television stations. (Even though I speak zero Italian, I can comprehend an Italian News broadcast fairly well, because I speak Spanish on a daily basis). Sometimes, I just watch and listen to German media just to listen to the way that people pronounces their \r\, \s\, \ch\ and other phonemes, it doesn't bother me that I don't understand much at all.
With that said, as my vocabulary continues to grow I will start to recognize more and more words, and I might start say things that are distinct to each country without being able to distinguish the three standards above. So, my question is as follows.
My Question: What kind of media should I be watching and hearing, if I want to understand Standard German?(For example, if I want to be able to read books like Grundzüge der Mengenlehre or die Lutherbibel 1545 )? I get the impression from the Wikipedia article above, that all three standards are mutually intelligible.
Is it true that all three standard Germans are mutually intelligible? If, so then what is the harm in choosing consume Swiss media, over German or Austrian media? Would it be a bad ideal to mix the three? In the US Spanish speakers must get used to a wide variety of dialects, some with different vocabularies and sounds (it's not "pescado" it's "pesca'o"). If I don't recognize a word the other person almost always in a matter of seconds finds a synonym which I do know. Is this similar to the situation with the three standard Germans? Are German speakers agile to adapt to other accents, as we are in the US with different Spanish accents?