Because magic is an unusual hobby, your family probably doesn't fully realize how important magic is to you. That's how it was for me. If you keep at it, you're family will come around, I promise. But you MUST keep practicing. Keep it important to you, and through time, you're family will be totally supportive. Also, magic can be a lucrative hobby, so after a few years, you can make a little bit with it. That effort will show your family that it isn't a waste of your time and resources.