Guys, can someone explain to me how to tell when it's ready? sticky orange, 18/6 light cycle

You still have about 3 weeks to go, maybe even 4.

When you have 95-98% brown pistils, you will be approaching the harvest window. When you get to that stage, looking at the trichomes will determine when to chop...........10-30% amber trichomes is roughly what you are waiting for.