The third house represents the sphere of close social circles, communication, education, short trips, and transportation. Accordingly, the Sun in the 3rd house indicates a person who is inquisitive, interested, and loves to constantly learn and acquire diverse knowledge. The world seems interesting to such a person, where one can always discover new things and learn something new.
Often, the person's professions are related to communication - journalists, communications workers, possibly even a housewife, but one who is sociable and constantly in contact with someone; this can also include bloggers. The work may be associated with frequent business trips, travel, cargo transportation, in the transport sector. Also in the sphere of primary and secondary education.
The father may assist with studies or influence the choice of education.
Siblings can play a significant role in the person's life or be rather prominent personalities.