Newibe - Is CI good for me?

[eluser]Unknown[/eluser]
Hi,

Im looking to create a content website based around images and galleries, as well as user accounts (free and premium) and also content uploads etc. This is way above my head so I will be hiring someone else to code it for me. However before I start, is CI a good framework for me to use for this kind of content? Im after a really lightweight system that will make creating this kind of website more straight forward.

Also, are there any existing basic front end / back end scripts aviliable that I would be able to use to build my project upon (for example that already have a user account system in place), or do I have to start from scratch?