On imgur you can create an album and set it as 'hidden' so only you or people you send the direct image and album links to can see them. You can also default all images and albums to hidden in the account settings! Really a great image hosting site once you get used to it.
Woo 3 months HRT me too! I am inexperienced and terribly bad at makeup so not much to offer there.. Except doing a bit more eyeliner and mascara? Don't go crazy, make sure to keep it subtle but you can find some great makeup tutorials on youtube and elsewhere. Absolutely smile, makes you look adorbs.
Ohw and the stares are always there -at least for me-, but you gotta shrug em off and just have a good time with your friends. A first outing can be quite scary, I wish you the best of luck and hope you'll have lots of fun! Any particular band/artist you want to see on this concert?