You can get a handheld microscope at Radioshack for $10. It's in the soldering section. It is just like the 420 scope that sells for $26+ online. I just bought one yesterday.
Also you will have to be sure what your looking at it the TRICHOME because the little hairs on the leafs and nugs are not them they look like a shroom with a completly rounded head. Also when they are amber they are faintly amber not a dark dark amber like brown. They should look somewhat translucent not opaque.
For up cereberal highs harvest when still transparent, middy stone some will be amber, stoney lazy commercial stone they will be 75% or more amber. Just take your time and examine like you are a scientist and you will do well.