Its a nice sketch you did.... Sketching is form of art which gives a non living object to look like alive or real object. If you want to enhance your sketching skills than you have to know about drawing pencils & pen because they plays a major role in it.
Hmm...Its a good idea to start working on some creative things. Drawing & painting is full of creative ideas and imaginations. If you want to start any art stream first of all you need to know about art supplies related art streams which will help you to create easily your paintings.