Yes indeed the perfect is in need of nothing ,
Thus there is no need to create anything for himself per se but yet he is a creator.
This is how it goes, God deserve the title creator because he has created himself.
And since creating himself, he ceases to create any other thing.
What we as human perceives as creation, was put into motion by God as his first and last act to serve as representation of who he is.
God has set himself the most noble of any task , which is accomplishes in and by His rest. The task is the replication of perfection.
Now as a human you see things as good and as evil, so as to fully understand what perfection is and how it works, so that you may know what is required to cause it to be accomplished.
God is not perturbed however, that with the wisdom to know good and evil, men uses this knowledge to seek to accomplish their own agenda, foreign to what He is intending ultimately and seemingly bring his name in disrepute..
That kind of action is not only expected, but fully intended, for by it the purposes of God will be accomplished.
If it was not so, his noble task would be fruitless.