If you're trying for a tincture or quick wash, the "Golden Dragon" or GD method work, and is safe to consume.
Use everclear or culinary ethanol, and at least a half oz.
Decarb your weed at 235F for about 30min (give or take around 5min).
Put the decarbed plant in a quart mason jar, and place it and the alcohol in the freezer overnight to 24h.
I use about an ounce of flower to a 750ml bottle of everclear, so adjust your amounts properly and combine the two.
Replace it in the freezer, and about every 5min, give it a solid shake and put it back in the freezer.
Do this 6 times, then strrain.
You now have a nice, strong tincture that you can use for RSO, sugar, etc., and it's easy to calculate the potency if yuo know your plant's data.