A Main Character can have a personal goal at the outset of the story which can change before the first act of the story is completed. The new goal should be the same through the end of the story (at which point the original one might pop up again to start a different story). Over the course of the story, the MC’s personal goal will have its own requirements, prerequisites, preconditions, consequences, etc. that he must address on the way toward achieving his goal.
Warning: Do not confuse the MC’s personal goal with the Protagonist’s efforts to achieve the Objective Story Goal. Though you may design a character that is both the MC and Protagonist, do not make the mistake of combining the MC’s Goal and the Objective Story’s Goal—they are different.