You are no more of a mess than the rest of us! You have to be either Aquarius or Pisces, that "on the cusp" business is a misnomer that's been allowed to exist which is untrue. There are cusps in astrology, but they divide the 12 houses, and you can only have one Sun Sign. It doesn't always change on the 21st of each month either, so you have to use the year as well, and look it up online. Try a site like Cafe Astrology; I use tables from there.
If you are intelligent and love new things, you may be Aquarius. If you are sensitive and dreamy, you may be Pisces. Either way, since every planet is in a zodiac sign, you likely have a planet in both Aquarius and Pisces, like Mercury or Venus, in addition to the Sun sign we don't know.
Scorpio rising people have the traits seeming reserved, strong-willed, powerful and magnetic. You usually do what you set out to do. You have strong sex appeal, and others are drawn to you. Although you don't come on strong, you need to express yourself and others may be intimidated by you. The Capricorn moon represents your emotions, and you hold them in. You feel strong feelings and are emotional; you just don't wear your heart on your sleeve. You don't like to be out with somebody who likes to make scenes, and I bet you don't like surprises. (I have a Scorpio rising and Capricorn moon too)! You want to know what's happening, and with that Scorpio rising, can read most people like a book. You don't waste time on people unless you decide you like them or they can teach or be useful to you in some way. Or unless you love them, of course.
The Capricorn Venus is another way you hold in your feelings. Venus rules our love lives and social lives. I worry you let relationships slide because you don't tell the other person you care, or show it in little ways. Don't forget, you can read others well, but they can't read you hardly at all with this Moon, Ascendant and Venus. So you need to go out of your way a little to show others you care. It's a hard Venus position. The feeling is there; it's just hard to express. You also may be a bit of a social climber or trying to attract a certain kind of person who meets your set of standards, instead of just letting things happen naturally, and could be getting in your way.
If you have trouble with the Sun sign, write back with your birthday, just give me the year you were born too. I have articles about every Sun Sign on a site called Exemplore.com, and actually, there is a link on each of them, usually in the first paragraph, which leads to a table where you can look up the Sun sign.