There are plenty of hair tutorials on the internet/youtube you could google. You could do some sort of half updo or curl it and leave it down? Back in the day what I went with (I did my hair and makeup myself as well) was http://www.youtube.com/watch?v=i3iSEgxQDPU which was fairly easy to do - mind you with your hair shorter than mine at the time the braids might not be long enough to do a full wrap around.
As for makeup I have no idea how much experience you have. I only started using make-up relatively recently and I suspect it is different for everyone depending on their eye shape. Off the top of my head maybe http://www.frmheadtotoe.com/20.....-mail.html (colour is even relevant!) or http://www.frmheadtotoe.com/20.....urple.html. I'm afraid my pool of resources mostly only includes asian bloggers but there are so many resources out there
I hope your prom goes well! I had a lot of fun at mine.