Concept/Character Artist For Cartoon Show

I'm starting plans for a cartoon show but am not the best drawer. I have ideas for the character design, the world's, it'd be along the lines of things like Voltron and treasure planet so space opera-esque but based on a different world. I need an artist to design the characters and come up with vague ideas for how the world looks. I have descriptions and vague scripts. I just need help starting it. I'm unsure what exactly I need. I'd like to start with character design so for right now, I'm looking for the design of 2 characters and am just trying to find a style that I feel fits. I will give more detail to the person hired but one is human, one is humanoid but is an alien.