Lordy you're tiny! Well, if you have a girlfriend, a sister, girl friends (different from a girlfriend
) you can always go shopping with them.
Buy things that fit. You're right, baggy clothes on you will make you look like youre swimming in them. Buy clothes that fit. Not super tight jeans, but not baggy either.
As for stores... I guess I like guys that dress a bit preppy casual or whatever. Gap, JCrew, American Eagle, Structure, stores like that. You could always look online, see the styles.
As for the eyebrow waxing.... Go easy on that. Its great to keep them up and all, but you dont want to look too groomed
