Observe and react. Nobody can tell you how ripe you want it. If you haven't experimented with enough harvests, you'll just have to work that out over time. That anxiety fades. Be systematic about it and you'll shorten the learning curve.
The only wrinkle i find to that is that some plants don't seem to show much amber even if the plant nearly dies on the stem, lol. Not a problem if you prefer the late-window stuff, but i'm not a fan so i also use a 'max days from fully fattened' rule... it's not rigid, but i won't go more than 7-10 days beyond fully fattened colas... thats a personal choice, not a recommendation.
But, just use physical observances and react to it -- that'll keep you honest and consistent. Can easily adjust as you better learn your preference on ripeness.