If you are going to hire a studio ask the studio they will have a list of models who regularly work there.

If you are new to it all I really would suggest some tuition though. Join in a studio class where the intructor will provide a suitable model and some tuition on how to use the lighting. They will also give tuition in all the other factors you need to consider such as how to pose the model, release forms etc  etc.

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html