Firstly thanks for looking!

Ive tried searching, googling, multiple forums and websites but just don't understand how to do this so wondering if you lot could help me?

Me an my dad share apple id's for the sake of paying and downloading apps/music etc. once but now mine and his contacts have collabarated as one so he has all of mine and I've got all of his!

Is there a way to have this set-up?:

My iPhone/Macbook: App store - Email#1 iCloud - Email#2

His iPhone/iPad: App store - Email#1 iCloud - Email#1

Ive set up a iCloud account but for some reason the account seems to be linked with Email#1

P.s: if our iCloud accounts were separate, would that mean the extra storage I've bought from apple be removed for me?