I learned fairly quickly first thing to do with a kit is, 1 the size ie 23L then throw the instructions in the bin, 2 dont use sugar or enhancer use straight DME color of your choice, 3 ditch the yeast,4 brew it 2l short pitch the yeast of your choice lid on leave for 2 weeks, 5 when it's ready keg or bottle, i made many a fine brew this way but give the instructions to the dog or bin there is no way you can do a kit in 21 days, they just want you to buy more kits