I had my hair trial last week and it looked great in the salon, a half up/half down curly do. I have long, sort of wavy thin hair. Within an hour of leaving the salon my curls fell. I've heard that extensions hold a curl really well, and help to add volume, which would look great in my thin hair. The problem is, I've never used extensions before. I don't know where to get them from and if they are easy to put in. Also, since my hair will be half up half down, are the top of the extensions easy to hide, I don't want them to be falling out or anything!! Any tips or advice on extensions would be helpful!!