I hear a lot of potential, like A LOT! All あなた have to do is grow into your voice (it'll improve overtime...when you're voice is completely done with puberty). As for advice, don't try and sound like the girl singing. Your voice sounds Britney Spears-y. Sing like you. Turn off the vocals and background music, read the lyrics, and sing. Find your own voice. I used to do the same.
But for the most part, your voice is absolutely fine :)
How come when あなた post these questions, あなた get nothing but positive, but when I do, all I get is "STFU DONT POST YOUR 歌う HERE!! あなた sound fine, but SERIOUSLY UR PISSING ME OFF MY POSTING THESE!!!!" *pouty face und hurt feelings*