What? How old are you? :V!
You're drawing is lovely, what might help is try to do some shadowing, even if you are not going to colour it, if you are going to colour it, do the shadows with the colours, if not just the pencil might help.
But this is a really good drawing, you should be proud of it.
My advice is: Even though you think it's bad, don't give up and continue drawing.
Or you can do as my last drawing teacher used to say to us "Never use the eraser" but that's kinda stressful, because I always spam eraser at my drawings. XD
That's me on the photo alright.