Jwjohanswered grow question 5 years ago I personally like to harvest right when I spot the first couple amber trichomes and the others are pretty much all milky with a few clear stragglers here and there. It gives you a little more of a head high / amped-up kind of feeling whereas if you wait for more of them to amber it's more of a body high / couch lock kind of feeling. Especially with an indica, it can mean the difference between a creative high where you can function and being laid out in front of Netflix for hours!
It definitely looks like you're inside the harvest window, now it's up to you to decide what kind of buzz you want out of it and if you want to wait to see if they stack on more calyxes etc.