Man... there is simpler ways to cook with weed... my own advice is:
Fisrt, wrap completly your weed in tinfoil, then put it into the oven at 150C (300F), during 5-10 minutes. It will decarboxilate your weed, increasing (sometimes greatly) its effects.
After it, grind the weed as fine as you can. It will be easy, cause when we decarboxilate the weed it becomes more dry and crunchy.
Then, put the amount of weed you want to use in the oil. There is no need of "exact" amounts of weed and oil. Just mix them in the amount you need.
Heat this oil for some time. When i cook with weed, if the weed is finely ground, some 30 minutes of heating are enough. The oil must be heated for more time if you plan to use only the oil and filter the weed. But, if the weed were finely ground and you dont care eating small bits of it, then let the weed mixed in the oil.
Finally, use this oil wherever you wish. Note that there will be bits of weed mixed in it, so be sure to put all those bits whatever you put the oil, for avoid losing any weed.
And, enjoy! Usually when i eat weed, the amount of weed i use is 2-3x the amount i smoke, and it works well enough. So, good luck! I hope you get HIGHHHH! :thumbsup::stoned::rastasmoke::abduct: