There's a little bit of contradiction in this combo that you probably can feel. Leo Sun people are strong and independent. You can be bossy and expect to get your own way. Some people will like that and gravitate to you, as Leo is ruled by the Sun. People close to you will sort of revolve around you in your social circle. But the Cancer Moon is changeable and moody. Emotionally speaking, you aren't always "on" like your Leo Sun wants to be. The Cancer part of you needs space and some quiet time for reflection. Think of how the Sun rules the day and the Moon rules the night. Also, Cancer Moon people's feelings get hurt easily, and can sometimes be too sympathetic and be taken advantage of. The Moon moves through all twelve zodiac signs in a 28-day cycle. That means it's in a different sign every 2 and a half days. A Moon Sign Book or calendar would help you a lot! You could see how differently you feel when the Moon is in Aries or Scorpio, and so on. I have a Cancer Sun, and following the Moon, signs have explained a lot to me about my self and moods!
If I can help any more, please come on back! Jean