ANSWER:
zodiac signs actually have no affect on us, all the planets and constellations or whatever are too far away to affect humans in any way.
thanks to the barnum effect, horoscopes are able to give a general trait description and since you are a human being, you'll relate to them on some level.
basically, zodiac signs mean nothing and theyre just a fun thing to do, never let it actually affect any aspect of your life.
professor dave has a good video on utube explaining it much better than i ever could. i'd recommend watching it
cant put the link but the title of the video is 'Astrology: Fact or Fiction?'