This one has been up on youtube for a while and is already linked in your instruction book but I wanted to repost in hear in case you missed it.
The most important thing to remember about hand sewing a blind hem is that you are moving backwards. For instance, I sew left handed. Normally that would mean I sew from left to right, but when I am blind hemming I sew from right to left.
Watch the video for further clarification:
See you at the next one!