As salamu alaikum sister,
May I ask how old you are? In Islam, a woman is considered a woman the day she starts her menses, as the Prophet Muhhammad (pbuh) did not sleep beside our beautiful mother of islam Aisha until after her menses started.If this is the case for you..you are a woman and capable of making your own decisions about hijab and its not your parents decision. In Hadith it say,"
"Ayesha (R) reported that Asmaa the daughter of Abu Bakr (R) came to the Messenger of Allah (S) while wearing thin clothing. He approached her and said: 'O Asmaa! When a girl reaches the menstrual age, it is not proper that anything should remain exposed except this and this. He pointed to the face and hands." (Abu Dawood)"
So Why Wear Hijab?
There are several reasons:
1)So that we may be recognized as a believer and not a non-believer (kufr).
2)So that we may not draw attention of the mens..and protect our modesty so that we not be harassed.
Surah Al-Ahzab (33:59) states: "O Prophet [PBUH] Tell thy wives and daughters and the believing women that they should put on their outer garments; that is most convenient in order that THEY MAY BE RECOGNIZED (as Muslims) and not be molested."
Volume 6, Book 60, Number 282:
Narrated Safiya bint Shaiba:
‘Aisha used to say: "When (the Verse): "They should draw their veils over their necks and bosoms," was revealed, (the ladies) cut their waist sheets at the edges and covered their faces with the cut pieces."
3)For prayer..wudu and prayer not valid if a woman hair is not covered...
Narrated 'Aisha: The believing women covered with their
veiling sheets used to attend the Fajr prayer with Allah's Apostle, and after finishing the prayer they would return to their home and nobody could recognize them because of darkness. (Book
#10, Hadith
#552) Sahih Bukhari
also about prayer..make sure u have your feet covered during prayer..wear socks..because it is not valid if feet not covered.
Hope this helps sis.
-As salamu alaikum, Aisha K.