Astrology isn't just about your Sun sign. Your Ascendant and Moon sign are of equal or greater importance and when you take into account the placement of all your natal planets, by house, sign and degree as well as aspects they make to eachother you end up with a complete picture of a personality. If you do it twice and line the charts up together you end up with a clear picture of how a relationship will be, and the kinds of things you might have to work on to make the best of it. If you line up the natal chart with where the planets currently are transiting in the sky you can make predictions for that individual for the year ahead.
You can learn so much about yourself and those close to you through astrology. I offer several different readings that are reasonably priced and easy to book. My Instagram is @sidereal.sarah and there is a link in the bio to book!