I appreciate that u tried to draw something from scratch.
And i encourage u to continue to do so. But, in order to succeed, u have to practice a bit.
The icon looks blurry and lacks shading.
There's too much white(try to use some more color variation) and add some details if u can.
The whole image could be clearer and more accurate.
I suggest u to define the whole thing better, to add some shading using darker and lighter tones of the colors that u've chosen.
Also, i advise u to read some tutorials, to see, step by step, the icon creation process:
How to Make an Icon
General Icon Process Tutorial
Basic Icons Tutorial
ICONS by Crazyrussian
Basic Icon Guide