Hey!
Those trichomes are looking pretty cloudy
Harvest window opens when you start getting amber pistils.
The best way to check is looking at the trichomes on the buds.
Clear trichomes haven't reached their full potency, cloudy ones are full of THC and amber are losing THC while gaining CBN.
I harvest when after examining and finding 70% cloudy trichomes and 30% amber trichomes.
For me that's a prefect combination, depending on the strain as well.
With some strains I go with lower amount of amber trichomes but always attest 10%.
This really depends on what type of high your looking for.
As for what they look like, clear trichomes look like shiny glass, cloudy like plastic and amber like resin.
Funny thing is.. I always give growers this little trick to differentiate the trichs. I learned it from an old school grower who is actually color blind, well he told it’s a type of color blind. He said his colors are different from mine. That trick helped him to notice the difference and I’ve been using it since.
Hope this helped.
Good luck and happy harvest!