I personally think of “will” as being closer to “discretion” than to “action”, but I’ll try to steer the conversation away from semantics.
What I want to focus on is what leads you to conclude that your will, or your discretion, is not deterministic. Forgetting, if we may, arguments for or against determinism from a physics perspective: what’s the argument from your personal experience?
As for morality, I would make the case that ontology should inform morality but not the other way around.
That’s not my definition it’s almost verbatim from the Oxford English Dictionary. Still, it’s exactly how I feel.
But morality is important to this discussion I think but I cannot put my finger on “why” it is.