Hi Gabrielle!
Your best bet would be a compact bundle, including a camera and housing.
The Fantasea G16 bundle has been our most popular bundle for the past year, and delivers excellent value for money.
You can read about it here:
http://www.housingcamera.com/id2206-fantasea-13911-housing-canon-g16.html
We also have a great review posted on the bundle here:
http://www.housingcamera.com/blog/product-reviews/canon-g16-underwater-wfantasea-housing-review
Other options include the Canon G7X bundle which is slightly pricier but features a 1″ sensor with amazing image quality, and the Olympus TG-4 bundle, which is capable of excellent macro shots straight from the box without any add-ons.
To find out more about choosing your first underwater camera, read this:
http://www.housingcamera.com/blog/guides-tutorials/choosing-your-first-underwater-camera