Hi @tradingest. I don't think this can be done. Darwins can only be created from live trading accounts.
But you can create a small live account, then after you have the required experience, create a Darwin and test it that way.
Edit - Oops, didnt' notice your post was from back in November. I guess your question has already been answered. I'll leave this post here anyway, in case it is of use to others.