First off, all acorns do not taste the same, so make sure to do small batches of different kinds to find what you like. My personal favourite is California Valley Oak.
I like to put mine in the oven on low heat to kill the worms inside but this is not a required step. I crack open the acorns with a pair of pliers. Grinding the acorns BEFORE soaking makes the whole process easier. Put the ground up acorn meal into some kind of sheer material and secure it so it makes a bag with the meal inside. Put the meal in a clear glass bowl or container and completely cover the meal bag with water. Change the water 3x per day the first 3 days, 2x per day for the next week. I run the meal bag under the tap and squeeze it out each time I change it. At least make sure you squeeze it before putting it into the fresh water. It takes 10-14 days for the ground meal to finally have pretty much clear water after a full day of soaking. The meal needs to be set to dry before storing it. I put it in the freezer to prevent mold. I add it to my oatmeal, meatballs, and rice. I put it in salad and change it in for cornmeal to make bread.