I started playing the DnD 5e starter campaign recently, and the character I've chosen is a Dwarf Cleric aligned with Marthammor Duin. I've decided to play him as a bit of a zealot, and so I don't feel like I know enough about this god of whom I am supposedly a devotee. Specifically, I don't know how I would feel about necromancy, about thievery, and about respecting other religions. I'm sure I won't get answers to every question I have about the religion, but literally all I know is that Marthammor Duin is the god of travelers and outcasts, which isn't enough. Where can I learn more about him and just gods in general?