If you pay attention to trends among people working with adolescents, one word you'll hear frequently is "mentor".

A mentor is an individual, usually older and always more experienced, who helps and guides another individual’s development without having a goal of personal gain.

Some professions have "mentoring programs" where newcomers are paired with more experienced employees who advise and guide them as they advance. Schools sometimes offer mentoring programs to new students, or to students having difficulties.