From the pics, the thricomes are mostly transparent not so milky and there are lot of white pistils on the top. Also the leaves still look very healty. I think you should wait 1-2 weeks more. So you can start flushing imho. Have a good harvest 😉
I guess another 4-5 days and you can start flushing.
Anyway the only reason to flush is saving money on fertilizers. You can actually not flush at all and there will be no loss of terpenes or cannabinoids.
The myth of flush has already been disproved