How do u save stuff to iCloud

First be sure you have an Apple ID and then create an icloud account.

To manage/create the Apple ID:

https://appleid.apple.com

Then go to Settings>icloud, sign in and turn on the features you want.

Go to settings/iCloud/sign in with your apple or create new one/turn on apps you want to sync with icloud

This is a pretty good guide... http://www.imore.com/ultimate-guide-icloud