Apologies if I’m interpreting your question incorrectly, but I technically started out drawing trees, the sky, pretty much everything I would see (and this is when I was around four or five). After I stopped for several years and started drawing again (when I was about nine or ten), I then just drew animals and characters I’d see on TV, and kept at it ever since. :)

Of course now, though, I do try to draw from my own imagination as well, and not solely creations of others! Which, still isn’t a bad thing, but it’s always good to show what YOU can come up with. :)