nah man, didn't make them. found them around the internet, google is pretty good for getting ideas when you're someone like me who can't draw .
well, you've almost got exactly what i was thinking, except swap the positioning of the flower and skulls. the only reason for that is that the top of my arm already has skulls on it, so its supposed to kind of flow from my main body tattoo, to the skulls on the top of my arm, all the way to the flower on the bottom of my arm, you see? apart from that though, spot on mate (Y). wispy bits, skulls, flower. the main story behind it is the idea of fate - life & death. from the flower (life) progressing to the skulls (death) and then beyond that is my body tattoo (fate). i'll somehow get my tattooist to join the 2 together, but you're literally a hero for doing this mate, seriously.
plenty of time, don't rush it or let it get in the way of college . i've still got to finish off my current tattoo before i get the sleeve, so its gonna require a lot of money that i need to save up, so take as long as you need .
and seriously, if you're drawing as good as that at 16, you're fucking laughing, you'll easily get an apprenticeship in a tattooist - 4 months later you'll be tattooing paying customers. i promise you that mate .

--
In the desert, I saw a creature, naked, bestial,
Who, squatting upon the ground,
Held his heart in his hands
& ate of it.
I said, "Is it good friend?"
"It is bitter – bitter", he answered.
"But I like it, because it is bitter,
And because it is my heart."