You didn't tell me what house the SN is in. But as long as there's nothing unusual in your chart, it should be in the 5th house. So the way it goes, the South Node is about past lives, and the North one is about the karma you need to work on in this life. The 5th house rules romance, children, gambling, and sports, to name a few things. Since the SN is in Pisces, in the past, you had a whimsical, fun-loving, and emotionally centered attitude towards romance and the issues I mentioned. Now you have Saturn in Virgo, and Saturn is the karmic planet which teaches you lessons. Now you have to be more responsible and sensible. This will show up in the house of hopes and wishes, friendships, dreams. It's time to get more practical. You will learn the most in your life through friends, and by probably having to work really, really hard to achieve your dreams and hold onto your friends. Saturn takes about 30 yrs. to move through all the zodiac signs, so your N N is tied up with your Saturn Returns. I wrote an article about that, here is the link: https://hubpages.com/astrology/Astrological-Saturn... The last time Saturn was in Virgo was in 2008-2009. I don't know your age. Was that a time you experienced a lot regarding your hopes and dreams, or friendships were affected? If not, it will take another 27-30 yrs. to get there. But either way, those areas of life will still be important to your karma in this life. I just brought up the Saturn Return since it's going to be tied into your karma at some point in this life.
The Sag Sun makes you easy to get along with, philosophical, not judgmental. You are an independent person. The Libra Ascendant means you seem charming and like a team player, and probably are both. The Cancer Moon is your emotional center. You have a nurturing and caring aspect to your personality. Cancer and Libra are both leadership signs, so you do have goals and are ambitious. Goals are like dreams, and hopes, in a way, so think about that and how it will affect your karma as you make decisions.