Memorizing a Surah and imagining one is reciting it in front of people

Q: Someone is trying to memorize Surah Yaseen and recite it like Omar Hisham al Arabi. But when she try's to recite it, she imagines that shes doing it in front of people and imagines that she will recite to others later. She feels sad thinking that she can't focus on the fact that it should be only for Allah.

Should she stop memorizing? Should she take an oath that she will never recite "like that" in front of people? She also thought that she would recite beautifuly like that in front of her future husband. Is there any duaa for this?

Receiving the rewards of reciting the daily surahs when recited in nafl salaah

Q: Will we get the respective rewards and benefits of reciting Surah Waaqiah, Surah Mulk and Surah Sajdah if we recite these surahs in nafl salaah (Tahajjud) at night or do we have to recite these surahs before sleeping without being in the state of salaah? Similarly, by reciting Surah Yaseen in Ishraaq salaah, do we get the rewards and benefits of reciting it in the morning as mentioned in the ahaadith.

Accepting a gift from one's na baaligh sister

Q: I was studying Arabic and my sister, who was about 11 or 12 years old, gave me an Arabic learning book that my uncle gave to her. I would use this book for my class and then at some point after, I mentioned to my father that she gave me the book and my father didn’t object to that.

I have recently been told that this was not a valid gift and a Wali can’t hand over the property of the child and that the gift of a child to an older person is not permissible. The father is also not allowed to give or allow the gift of his child without something in return. If at the time I thought this was valid, such as the Wali knowing (my father), what should I do?

Cutting one's nails and hair after one's qurbaani animal is slaughtered in another country

Q: A person refrains from cutting his nails/hair due to performing qurbani.

He follows Saudi for Eid (20th of July) whilst his wakeel doing the qurbani for him does so on Eid day in India (21st of July).

Does he therefore need to spend his Eid with long nails etc until the wakeel has slaughtered his animal the next day? If so, he also has no way of finding out what time of the day on the 21st the animal will be slaughtered, so how does he know what time of the day to cut the nails/hair?