How to use the next-generation spaced repetition algorithm FSRS on Anki?

the normal review intervals (green)
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They were Slightly longer than expected….
As per Conan’s settings, this should be 15 days
(if pressed good, intervals=1day,6days,15 days)
And it’s 24 days after enabling fsrs
Now I am slightly worried, if I can remember that after 22 days just studying the card 3 times