Okay, so basically I want to replicate this voice https://www.youtube.com/watch?v=Lu9b7XxTHvI into Audacity, but its effects are so heavy I can’t figure them out… Could I get some instructions, pretty please? 
The main effects are pitch shift and reverberation (reverb). The effect probably involves mixing multiple tracks with different amounts of pitch shift, delay and reverb.
For this type of effect to be convincing requires “acting skills”. Much of the “effect” is not an effect at all but the actors voice.