That's definitely not enough. You must also rename tablespaces , views etc. Schema is not able to be renamed in db2. But all those tasks you can do using SPM tool https://service.sap.com/sltoolset under "System rename" option - i've done it few times recently as it was only option for "redirect restore" with copyng production into test in our client environment.
Just read System rename manual and reserve few days for this fun 