Can a cat speak English, study hard, and eventually get a college degree?
Agnosticism’s “not knowable” is a philosophical constraint, not a question. From an agnostic atheist (or theist) perspective, if there is indeed intelligence behind the creation of the universe, then we will never have the capacity to understand this or communicate with it.
Any attempt to try would be as comical as a cat trying to get a college degree.
“Live a good life. If there are gods and they are just, then they will not care how devout you have been, but will welcome you based on the virtues you have lived by. If there are gods, but unjust, then you should not want to worship them. If there are no gods, then you will be gone, but will have lived a noble life that will live on in the memories of your loved ones.”