Nikaah performed in the state of janaabat

Q: If a woman or man bathed before their nikah and didn't know they had to rub their scalp but every strand of hair (atleast they thought) was wet would this mean the nikah would be invalid as ghusl was not done completely? What about a woman who bathed after her periods before her nikah and missed some parts of ghusl but thought she was cleans. Is nikah invalid?

What if she did ghusl like this for 4 or 5 months after nikah and did ghusl like this after periods and sex? Does nikah invalidate? What if any part of the ghusl was done incorrectly or missed what is the effect of nikah? Is it invalidated?

Women going out to work

Q: I am a shy, introverted Muslim woman. I do not like being around many people, I like to keep to myself. I love staying at home, but my family wants me to work. I cannot find a job that suits both my personality and me as a Muslim woman. And I do not have a skill, like sewing, to make use of and work from home. What should I do? Is it wrong to want to stay at home and not be outside?

Receiving zakaat if one does not have zakaat nisaab

Q: A person has two out buildings on his property which he rents out. One is attached to the house which he is living in, he is also earning a salary. His total monthly income is more than double the zakaat nisaab amount. However, by the middle of the month, he doesn’t have any money left. He also owes his wife and some relatives some money. Is it permissible for such a person to accept Zakaat?