"Jesus went back home with Mary and Joseph"
"obeyed them" or "was always obeying them"
"Heart" here is a metonym for "thoughts and intentions." AT: "carefully remembered all these things" (See: rc://en/ta/man/translate/figs-metonomy)
This expression refers to her deepest, most personal thoughts. (See: rc://en/ta/man/translate/figs-idiom)
"become wiser and stronger." These refer to mental and physical growth.
This refers to spiritual and social growth. These could be stated separately. AT: "God blessed him more and more, and people liked him more and more"