here this will help greatly. This is a website of either 1 scientist or multiple( i cant tell) and they have brought bho and medical cannabis down to a complex science. Id say everything youd need to know is on this site except the smaller skills that you gain through trial/error.
I have spent maybe 50 hours of time researching about clean medicine and it has paid off. Ive been using safe extract that if close to free after paying for the equipment, and if your over 18 and are prepared to make some safe meds using skunk pharm tech, you wont be disappointed.
http://skunkpharmresearch.com/