When u think it’s done wait another week ! Lol / seriously get urself a jewelers loupe to ck trichromes, - personally I don’t even think about cking until nearly 100% of the white pistols have turned color and or rescinded , you will find what you like .
What strain ? Meds or rec?
Pretty much, but what you are really looking for are cloudy and amber trichomes. Get a magnifying glass or loupe and look closely at the trichomes (frost) on the buds. When ALL of the trichomes become cloudy with a good 10 or 15% of them being amber, it's pretty much ready. (they will be clear at first, then turn cloudy, then turn amber)
Looks like you've got a fairly sativa dominant plant and those can have flowering times anywhere between 9-14 weeks depending on the strain.