apprenticeship;  probation;  learning by observation;  apprentice;  trainee;  probationer
 accomplishment;  lessons (in an art, skill, etc.);  practice
 practice writing with a brush;  study;  learning
 ingrained habit;  second nature
 the way of the world;  the lay of the land;  the inescapable circumstances (of life)
 accomplishment;  lessons (in an art, skill, etc.);  practice
 the way of the world;  the lay of the land;  the inescapable circumstances (of life);  (just) the way things are