Be careful that you don't slip into the Qur'an-only heresy. Allah (swt) did not just throw the book down and say "Memorize this, you'll have a test on it all next Friday." No, He revealed it over a 23 year period to the Prophet Muhammad (saws) who was our teacher. This teacher taught us how to best apply this book, and we find his lessons in the hadith. The female sahaba covered their hair because that is what the Prophet (saws) taught them.
The path of Allah (swt) has been well trodden by millions over the last 14 centuries. Why not walk that path first before you go off to places that are less well known?
you're right, I have been focusing on the Qur'an maybe a little too much... it's just that I read a few things claiming that there are some hadith that are not to be trusted, the chains of transmission too weak. I figured the Qur'an is protected by Allah and will never be distorted... so I've been relying on that. but of course there are some truths in the hadith...I will have to look into it more...
I am a revert and i really love wearing the hijab i wear the khimar which is long and doesn't need to be pined in place i prefer it because it covers more of me i read up on islam for about 6 months maybe more before reverting i researchd all the hadiths i could fine on hijab most of them have been mentioned already and they all strong good hadiths the Quran the sunnah and the hadiths all work together and back each other up.the longer you study islam you will learn which compilers of hadiths are good i always like bukhari or Muslim but thats just me i found the more my Eemaan became stronger i felt the need to wear the khimar the women at the time of the prophet i.e his wives did cover and they were very righteous and Allah [swt] was pleased with there fore i like to copy there ways so insha'Allah Allah may be pleased with me also