What should a young man do who lives in a social environment with a deviant doctrine that associates partners with Allah and practices forbidden customs and traditions, and he is convinced of their error, but cannot currently live independently?

There is no harm in you living with your family as long as you are unable to be independent of them. Strive to learn the truth and convey it to them with gentleness and wisdom, for the Prophet, peace and blessings be upon him, said: "For Allah to guide a single man through you is better for you than red camels," and he said: "Religion is sincere advice." If there is a father or mother among your family, be sure to advise them with gentleness and affection, as Abraham, peace be upon him, did with his father. Choose the appropriate times and methods for advice, and any of your customs that contradict Islamic law must be abandoned.