Greetings from Southeastern Wisconsin

Welcome to the forums from Ohio!  You will find a wealth of helpful information here, and a group of friendly people happy to share their knowledge and experience. 

You may want to consider downsizing the number of beds, or the amount of square footage, that you start out with.  You will quickly find that the SFG method produces much more food than an in-ground garden does. 384 squares will provide much more produce than the average family can consume.   As an example, for many decades we had a 30'x60' in-ground garden (1,800 sq ft), and we grew all of our vegetables for both consumption in-season and preserving for winter use. As age convinced me to start using raised beds, I installed a number of beds that grew to total 230 sq ft (a fraction of the size of the old in-ground garden). The raised beds we now have produces more vegetables than we were able to grow in the in-ground garden, and forces us to plant a little less each year.

Instead of starting with 12 beds, you might consider starting with 6 beds and then adding a few more as the need arises. Starting smaller makes it much easier to handle the learning curve of new techniques.