Libra is often the culprit when it comes to decision making. It's not that you can't make a decision. You look at problems from so many angles it confuses you. However, the Moon rules your emotions, so this would pertain more to family or love relationships. You could have other planets in Libra, but I can't tell that from just looking at your Trinity. Sagittarius Sun people are normally independent and can make decisions. They are blunt in speech and love outdoor activities. They are active, outgoing, and like animals. Cancer Rising is a sensitive sign and the way other people see you. So you can come off as shy or changeable. You are also approachable and well-liked. I can't really see why you can't make decisions on anything based on what I see here. Cancer can make you afraid to speak your mind or hurt anyone's feelings, and the Libra will cause the issues I mentioned. But without casting a whole natal chart, I can't see a reason why you can't make a decision in any area of life. Do you doubt yourself that much? Even when we make wrong decisions, they can often be fixed. Try not to be so paralyzed about it. Make a few small decisions, and try to find a trusted someone to discuss the harder ones.