You either did not catch what I said, or you are failing to grasp what I am saying. If God is outside of time, this does not stop God from also being a part of His creation that is constrained by time. On the 7th day after the 6 day creation, God had rested (i.e. stopped from His work). So how can God actually stop from His work if He is existing in some other dimension of time? God would be connected to the past via this outside pocket of time and would be working in the past and thus, He could not truly stop from His work. He would always be connected to the 6th day creation and thereby He could not truly stop in His work.
I’m not sure what you mean by God being part of his creation - in what way do you see God as being
part of creation, as opposed to interacting with creation?
Maybe the issue you are having is just one of definitions. To state the obvious, we don’t know how this works in any kind of detailed, technical sense, but we can draw some conclusions from what we can find in the bible:
God created ‘creation’, or at least put into order something that was already there. This doesn’t make him ‘part of’ it, quite the contrary, creation is a thing, God is a being, they are separate.
Creation is subject to progress, one moment follows another, time is how we measure that. God, being infinite and eternal, isn’t subject to that.
God sustains and interacts with creation,
from outside, outside as in ‘not part of’. In some sense creation is within God, but not part of him, which would be impossible - the universe and everything therein is subject to change, God isn’t. He doesn’t have bits of him that are, and bits that aren’t. See Acts 17:27-28 for example - God is
not far from us; but we have our being
in him; the same dual sense is found in Colossians 1:16-17, in him, through him. God sustains creation in some sense but is spirit, i.e. not a physical part of what we think of as the physical universe, although he affects it.
Re. ‘Stopping his work’ - if you take this to be a literal description of God ‘doing’ creation a bit at a time, then stopping, then this is God
interacting with creation according to the ‘rules’ by which creation functions; creation itself progresses, God, when he interacts with it, takes part in that progression from the perpsective of creation, not from his perspective.
If you take it more as it was understood when it was written, God brings order to creation, directing it and providing for it kind of like some mix of composer and conductor, and the same applies in terms of interaction in progression (the progression of creation); he then ‘rests’ or ‘takes up his position as ruler and sustainer of’ the universe.
The essential thing you need to grasp is the idea of separateness. For a crude and non technical illustration of the idea if you can imagine space time as a long cylinder then from our perspective it is constantly getting longer, as it progresses. From God’s perspective it has a beginning and an end. God can interact with any part of it at any time (time as a property of the cylinder - a part of what it is and how it functions)
from the outside. Outside of it, the question of time is irrelevant; God is interacting with our then, now and not yet from his eternal ‘now’.