What is your view, as a Gnostic, on the afterlife?
As far as I see it, gnosticism seems to have a big belief in dualism, is it strictly dualism or are there monist Gnostics?
What do you think the meaning of our existence is? (both why are we created, and what is the end goal)
Is the Christian Bible accurate in any way?
Do you worship Sophia or Demiurge or is it not important to?
Gnosticism is indeed dualist.
We were created in error in the beginning by a lesser god also created in error. In an attempt to correct that error Sophia, this time with the consort of her male counterpart (The wholeness of God being androgynous), gave mankind a balanced perspective, as a result we have freedom of choice, the end goal is God wants to redeem as many as he can whole, that is spirit and soul married by mind (the intellect of the heart) after the image of Christ.
The Christian Bible contains what I refer to as half truths, that is it has been heavily influenced by the religious, political and social structures of its time. It essentially is a belief only document, but Christianity is applied knowledge through Christ, knowledge from the heart of the spirit within, reasoned with the mind and applied and bonded, married to the soul.
We do not worship Sophia, nor the demiurge, we do worship the Ineffable Father/ Mother through the Christ Spirit within and the continued growth and development of ourselves spiritually through the Holy Ghost. This growth is manifest in our earthly lives.
If you are really seeking Truth I suggest you read two books one entitled, "The Gospel of the Beloved Companion" and the other "The Gospel of Thomas".