1. visible trichomes (crystals), the smell of it, buy in buds and not shake because it's easier to get ripped off buying shake.. alot of other people can give you better advice probably

2. don't kno much about them

3. i don't think swallowing smoke does anything but i know it doesn't give you a body buzz

4. and yes eating it does give you stronger high, but both times i attemped eating weed i made firecrackers(weed, peanut butter, crackers) and both times weren't some crazy experience, i wasn't sure if i was high or not both times to tell you the truth.. 1st time i did them i don't know if they worked or not, i was walking to my house and "imaginary" bees started attacking me, stinging me it seemed like going all in my hoodie.. i freaked out in front of this gas station and speed walked home cause i think people seen me then i got some food i think and passed out lol

5. umm i don't think so? lol.. does it matter how red your eyes get anyways?? it's just your blood vessels opening

6. and stems can get your high, but not as high as bud does.. stems have very little THC in them so its pretty much a waste and all you're smoking is the plant material