Maps go out of date. A compass still works when the road is new.

A detailed plan is only good for the conditions it was drawn in. Roads change, schools change, the job you were aiming at gets automated or invented. What survives all that is knowing which direction counts as forward for you: the kind of work, the kind of person, the way you want to treat people.

Write your direction in one sentence that does not name a specific job or school. Then hold the next real decision up against it and see whether it points that way. If the plan has to be thrown out, the sentence still tells you where to start walking.