I assume this plant as week6/7 am i right?

You can harvest if you want, its just a matter of taste But if you want a more relaxing high just wait till trichomes are more brown (15%) goodluck, Dont want to be blunt but thats just how i roll ;p

sure. do what feels right.

if you want to guess based on when it went into flower.. figure 7-10 days before you saw preflowers formed. This won't inform much about harvest date unless it's a clone you are familiar with. once the calyxes are fully plump, start scoping trichomes. How much amber do you wantt? this is a personal preference you will need to learn. When you see it reach that preferred threshold, go ahead and harvest the plant. Easy-peasy. The closeups are fine, but if the calyxes aren't fully plump you don't have to scope the trichomes yet. they'll send contradicting signals if you look too early. Trichomes are aging and turning amber at various points all over the plant long before harvest time.

Getting closer and that one does seem to be maturing a bit faster than the others in your diary, but you still have a while to go. You are only around 30 to 40% brown pistils. When you get closer to 90% you can start looking at your trichomes a bit closer. At least another 3 to 4 weeks to go.