How do you perform the stutter effect on vocals while increasing or decreasing the pitch?
In the multitrack you’d want to add the Pitch Shifter effect to your rack.
Next you twirl down the arrow by Show Envelopes on your selected track. Choose Pitch Shifter > Transpose Ratio from the Show Envelopes menu. Now you get a pinkish purple looking line that you can shape up or down to change pitch.
It’ll look something like this when you have it all setup:
This is something I’ll cover in a future live stream too 
Here is a video on how to do that effect.
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