Moved your thread to the Information Desk. :) Questions about the site should always be posted here!

Changes should be immediate for when you change your clothes.
If you've changed your hair or eyes or something and it's not showing, then you might have forgotten to hit "save changes" after every change. (ie: If you change your hair color, you need to hit save. Same if you want to change your skin tone.)

If you've done these things and it's still something different, it's a caching issue on your end and you just need to clear your cache. :)