Here is the full list of all 19 Acting Lessons achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Its fleece was white as snow
Chose Megan's path
Chose Ana's path
You finished Peter
Unlocked all gallery scenes
Chose Rena as a partner
A new beginning for Liam
Completed Episode 8
Chose Melissa's path
You are a matchmaker
Completed Episode 7
You spared Peter's life
Completed Episode 6
Completed Episode 5
Completed Episode 4
Completed Episode 3
100!
Completed Episode 2
Completed Episode 1