Manipulating content on the old iPad will not affect content on the new iPad
Following instructions here should take care of it
What to do before selling or giving away your iPhone, iPad, or iPod touch - Apple Support
Explanation: I usually am concerned about things such as notes and pictures - however if they are on the new iPad - and that is synced to the cloud then signing out of iCloud on the old device will not affect anything
(I personally have switched out 4 phones like that)
Nice name by the way Jonny Ives has a special connection for Apple - google it if you would like 🙂