Practice? You probably need to be pulling the yarn tighter at some point.
Try this video. I find she does tutorials that work for me. Maybe you'll see what you need to see. You can skip up to about about 2:00 in the video if you want. http://www.youtube.com/watch?v=bgtTuslHDRk
Are you familiar with magic circle for starting the hat? Here' a tutorial, not exactly the way I learned it, but it looks pretty good. http://www.youtube.com/watch?v=kvjYPFBP85c
There should be other possible videos to check out when you get there.
I just looked at your christening gown. Anyone who can make that will be able to master the slip stitch in crochet. Hang in there, you'll get it.