Don't flush. Don't listen to people at hydroponics store.
Curing is simple, but its where a lot of people screw up. I always do a wet trim (no hang dry) then put the buds on one of those drying racks. I like to cure at a cool temp in dark with slight airflow, with lower than 60 percent humidity. When they are somewhat dry I stick them into large jars with a cigar digital hygrometer. When the humidity gets over 65 percent I leave the lid off or burp. If the humidity gets up to 70 percent or so in a 24 hour period it goes back on the drying rack.
Don't know anything about oil, its illegal in my state so I don't mess with it.
I'm not familiar with Cyco nutes. If you ever start to learn what nutrients are comprised of, there's really nothing special. I think feed charts are a joke. In a nutshell you want a good NPK value. What NPK works for you the keep your leaves healthy through-out the grow. 1-1-3, 2-1-3, 3-1-3, 1-1-1, I'm no expert but seem to work generally well for people. Supplements are way over rated. In hydroponics you want the majority of your nitrogen to come from Nitrate and no Urea, and no organic nutrients in hydro.
I cant think of any youtube growers that I would recommend to follow, but curing reminded me of a good video.
- Jiji