Humboldt seeds blue dream auto is listed as being a 70-75 day(10-10 3/4 weeks) strain. Now breeder harvest estimations are usually a little shy of when most grows will be ripe and on top of that, there is some personal preference as to when to harvest as well.
Most breeder harvest estimates are 1-2 weeks shy of what the average grower can expect. This is due to the fact that breeders typically have a near-perfect environment for their plants. They usually blast the plants with tons of light and add a bunch of co2 and have everything dialed in. This results in bigger plants and faster harvests. Being that you recently finished week 9 and are still seeing lots of clear trichs, Id say you are at least 2-3 weeks away from harvest.
Keep a close eye on the buds and watch the trichs as they mature. I wouldn't check every day just yet though as handling the buds damages trichs and that's not what you want to be doing a lot of. Id say let it grow another week and a half and check the trichs. if there's still tons of clear check again after another 5 days. If its still got a fair bit of clears I would start checking every other day and then as things are getting closer and closer start checking every day.
Now where personal preference comes into play is in determining what kind of high you would like to achieve. Depending on how many or how little amber trichs you have you will have a different high. More amber trichs means the high will be more of a sleepy body high that glues you to the couch if there's enough amber. Less amber means the high will be more energetic, clear-headed, and focused. I typically harvest around 5-15% for a good balance. Some people will harvest at 1-2% amber for a heady high and others harvest at 30-50% to make them super relaxed and sleepy.
I noticed you don't have any really close up photos of the trichs on your plants. In order to easily see the trichs you are gonna need at least a 60x jewelers loupe or a 60x or higher USB microscope of some kind if you want to take photos easily.
I hope my answer helps you figure out when to harvest! If you have more questions feel free to dm me!