You have seen many 3D creations until know and it looks impossible even to draw a single object using the 3D art. There are several qualities you need to have in order to make a good work. 3D artists need to be patient. Many beginners unfairly compare themselves to established artists possessing years of experience. While it can be a great motivator, and valuable source of inspiration, to examine another's work, don't obsess; 3D art is a diverse subject, and requires a lot of dedication and practice to get acceptable results. Start with simple things, like you can find in this video and try to draw a water drop. 3D art is unique and you have to try it at least once!