I can't tell, from the photos, if your trichs are actually amber or are clear and just picking up the color of the leaves/plant material behind them... But here's the thing - if you harvest and it's too early (trichs are milky), the effect you're going to get from the smoke will be more cerebral - you won't get sleepy or have couch lock... if you harvest when a small percentage of trichs are amber (10-20%), you'll get the cerebral high AND get a relaxing effect as well.... if you harvest late, when most of the trichs are amber, you'll have a smoke that will a) have lost a lot of THC and b) will put you on the couch.... so it's going to depend on what it is you want from your product! It's also part of the learning experience - so if you feel it's ready, go ahead and harvest - and LEARN from your experience smoking! Maybe you want more of a "punch" so next grow, you'll know to leave it a bit longer.
If you have a loupe (pretty inexpensive - get one that will magnify at least 30%) use it to take an even closer look at those trichs... And good luck!
Happy smokes!