I'd like to know this too. How long did it take to roll and then sit under the dryer?
Your hair is so gorgeous!
It's normal to have some hair shedding at first. You could move to a fine tooth comb that has a little more space between the teeth to reduce shedding. Also, make sure your hair stays wet - not damp - throughout the process. Damp hair seems to pull and shed more during rollersetting.
You did a great job!