You start at Level 1, regardless of how many starting abilities you have.
Shinarians and some Zordin require more marks to increase their Grace.
Roleplaying marks. As part of an end-of-session or beginning-of-session ritual, each player can briefly tell how their hero grew in the attribute they chose, connecting the mark into something that occurred during the session.
You always round down your action die calculation to an even number as you advance this way.
List your revelations alongside your lore on your Hero Sheet.