Your weed needs to go through a decarboxylation process to turn THCA into THC. Put it in the oven for 25 minutes at 250 Fahrenheit. Personally I would dry the weed in a traditional fashion (not water cured)let it cure for a few weeks to breakdown the chlorophyll a bit then do a decarboxylation process. Next you set up a double boiler one pan with water with another smaller pan inside that one which will hold the vodka and ground up decarb. weed. heat it to about 150-160 Fahrenheit for a couple of hours to infuse the vodka. You will lose some vodka do to evaporation. Do not let it heat up to 170 F or higher or the alcohol will boil off. When finished filter the vodka through cheese clothe and then a coffee filter. You know what to do with it after that.