How to transfer information on a shared iCloud account to a new individual one? I set up an iCloud account under an old email on my iPad and I used the same iCloud account for my phone.

Now I have no storage space on either device or the iCloud accounts. How do I transfer my photos, contacts, apps, etc. from the current account on my phone to the same phone but on under a different iCloud account without losing any information?
There's no real easy way to merge data from iCloud accounts. Your best bet is to contact AppleCare direct with that question.
Find your local number here: https://support.apple.com/en-au/HT201232