At the end of the day happiness is so much more important than prestige or the image you portray to others, if your family aren't supportive then maybe they need to take a look at how they can make a positive influence on your life rather than trying to convince you to do something you don't want to do. Although in saying that, while uni may not be for you, don't be too hasty making a decision, have a meeting with your advisor to discuss your plan of action, good luck!