Are you studying Astrology enough to learn about your chart? I hope so because it would be very good for you to study your chart for your own ability to figure out your future plans/goals and abilities to get along with others.
You have a very powerful Grand Cross in your natal chart. It is a fixed Grand Cross and it includes the lights and Mars, Saturn and Uranus. So it offers you a tremendous amount of power and notoriety. But along with it comes some difficult circumstances and some obstacles.
The Uranus opposing the lights and squaring the Mars/Saturn opposition, is like a simmering underlying tension. Others will pick up on it and feel uncomfortable. It will be up to you to make them feel more at ease with you and see it as energy and motivation, not instability and uncertainty.
Uranus is electric, magnetic, energetic and creative, revolutionary type of thinking.
You will need to do a lot of self reflection and inner growth to clear away the awkward circumstances. It is easier to blame others and say that are all mean and awful and you have no part in the misunderstandings. But as you make your way into the world, you ay find it is an ongoing pattern that others pick up on the inner tensions, etc. So working it out with your sister and your parents as well as you can, might be the first step in your future success in the world. Your father may be abusive and you may not be able to make much headway. But maybe try and figure out WHY your sister has suddenly rejected you. Maybe you behaved badly and do not even know it or did it by accident. That is what sometimes happens with Mars/Saturn/Uranus afflictions. The important thing is to figure it out early and try to prevent future hassles.
Your strong Leo energy, elevated in the chart, signifies a natural born leader. You have so much to be proud of. But the Grand Cross is setting up obstacles that you need to power through before you can attain that level of success that your natal chart promises. You need to learn how to get along well with others, and how to use your energies wisely and in harmony with them. And how to accept constructive criticism without being angry or defensive. And how to stick to a goal and work at it ambitiously, and not just drop it and leave in anger or frustration.
Your chart is very powerful and you can have a lot of success in the world if you learn to harness that energy and forgive others as well.