Hey greenbud,
yes you can use any oil-- most certainly hemp oil. but it will end up being super green i'd imagine.lol
i use cannaoil in many dishes. I use 1/2 or full oz per approx 2/3 cup.
if you have 30grams extracted into 2/3 cup oil and you then put that oil into choco-chip cookie dough and make 15 cookies, each cookie will have 2 grams of thc. that makes one kick ass cookie.
yes you can take by the teaspoon, probably one of the least creative but easiest methods of consumption. i'm soo guilty of that. it's awful but VERY effective.
There are a lot of good threads on here about this. click this
Crock pot is the way to go
good luck man