A vector is a direction for the next weeks: what you want to work on and what you concretely do for it. The individual steps come afterwards from the programs and from the chat.
What do you want to work on now, where you feel: it's time? And what are you ready to concretely do for it over the next four weeks.
On saving, AXIS checks whether a vector comes from a program running against you. You can adjust your main vector once per 28-day window, that keeps it serious.