Attributes aren’t fundamental, Spirit is fundamental. Attributes occur within and by and through Spirit. Said another way: forms and objects aren’t fundamental, life itself is fundamental. Forms and objects occur within and by and through life.
So it is not correct to ask, “what form is God? What attributes belong to Him, and which do not?” That question incorrectly imposes attributes with the fundamental quality. That which is fundamental has form; it is not that form has fundamental existence. As Rupert Spira says, “Objects do not have existence, existence has objects.”
Does this mean that God is not kind, or compassionate, or loving? No, it does not mean that. It is quite accurate to say that God is absolutely and unconditionally loving, understanding, and compassionate. And indeed, the sojourn of the Spirit into duality ultimately expands the real depths of kindness, compassion, and love. What it means though is that we cannot successfully impose local qualities on that which gives rise to them. As we ponder the nature of God then, we are wise to turn from the thinking mind to the depths of being within us, which itself transcends the distinctions that abound in our physical experience, and itself already knows the truth that cannot be named.