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)
the way of the world; the lay of the land; the inescapable circumstances (of life); (just) the way things are