Well, I'd suggest starting work on a character sheet. That way you can post it once you've got Poke. As for restricted Pokemon...
You have to earn the privilege to make one! With Zorua and Mimikyu, you have to NOT have any issues with your characters in the past, AND be a "Member" rather than a "New Member", which is indicated by a lighter shade of blue for your username.
As for Ditto and Smeargle, they have a few differences from how they work in the main games. I'd suggest taking a look at the info on THIS
Wailmer, Phione, and Rotom are permanently banned from players to have as a character.
The temporary ban list changes over time, so I'd suggest looking at it before you post, and if your desired character's species shows up there, you're gonna need a different species. Also, keep an eye on species that are close to being banned. Eevee's almost always in danger of being banned.
Lord E V can probably help with anything else pertaining to "Da Roolz" and if you need help creating a character sheet to standard, I'd suggest getting help from PrimordialPrim, without whom I'd never have finished my first character.
PS: I love Smeargle too, it's too bad its stats are absolute garbage.