Hi there! Welcome to TPM, Hiiro! I don't think we've had someone from Scotland before! As Fanfiction mod, I am here to help!
Let's see...OC...cosplaying as an OC is a bit tricky as you'll need to explain backstory. And the thing about the bird training family would be a moot point unless he had a treasured bird Pokemon of his own to go with his Squirtle.
Another thing. Something like this would actually go in General Discussion. So I'll just move it there for you! ^_^