It’s unfortunate that he seems to suggest that in the video, because FSRS has no model for near-term memory. Blanking out your steps and deferring to FSRS is not recommended for most users. See: Reddit - Heart of the internet .
You’ll be better off with AnKing’s first suggestion (and the manual’s suggestion), which is to set 1 short learning and relearning step. If you want help figuring out the right length for your step – use the Helper add-on Step Stats/Recommendations.