I already saw that u got a lot of replies but I still like to share my experience with u. I started to wear hijjab in age of 23, its now one year ago, i started in beginning of the last ramadhan.
I was born and grew up in germany, my mum is german and my dad is pakistani. In germany its actually even more hard to publically show that ur a muslim as many ppl dont like foreigners and most muslims there are turkish and have a bad image (due to some probs in the society). Anyways, there are many girls there who were hijjab but do not dress and behave in appropriae way. i never wanted to be like them, therefore for long time didnt think abt wearing hijjab.
With the beginning of my studies (started to study for primary school teacher and did an extra subject islamic lessons which also included to learn arabic etc.) i started to get more into my religion, had more muslim friends and started thinking abt hijjab...after 1n half years, i changed my uni, but still did Islamic studies, this time as main subject. I learned more and more and came much closer to Allah swt due to hard times I had to go through.
Actually there was something inside of me who told me that the hijjab is the final thing which would complete me as a muslima. I already followed all other things in the best way I could and developed a strong faith.
Finally, close to the end of my studies and knowing that I ll get married soon, I decided to wear hijjab starting from the first day of ramadhan.
My family, except of my dad, didnt like it at all. each time I put it on, I had to listen to their comments and really had a hard time (I livd in kind of village in germany so ppl were sometimes really staring or showed me tht the didnt like muslims at all)...after 3 months i got married and moved to london and now it is one year that I am wearing it alhamdulillah.
Things is, u might have some ppl who dont like ur change but it is a voice inside of u who tells u to wear it and u should see it as a blessing, especially in the todays society. dont let the ppl, even if its in ur family, discourage u and try to find friends who have the same thinking like u...for me my husband was a great help and still is the most important person in my life...u r never alone, Allah loves what ur doing and sees all the hard time u might be facing and will reward u for being strong, faithful and patient...whatever ppl tell u: you are doing the right thing, so just listen to ur heart and to Allah and dont let ppl pull u away from the right path. u will be fine and happy, inshallah, believe me
Wishing u best of luck and hope u ll start wearing it soon, inshallah!
. A major word in Islam is "modesty" and thats just what I was talking about. 
