Can you speak passionately about your love of beer and brewing??? Have you ever told your buddies how you make beer?????
If so, you can do this...
WHen I was learning to write sermons and then preach them one of the tricks would be to babble into a tape recorder for a set length of time...then go back and transcribe what I said, and turn it into a sermon...
DO the same thing...take a recorder and pretend to tell a friend how you make beer...set a timer for three miniutes...spit out as much info as you can til the time ends...then listen to it and write it up...then keep f-ing with it until you get what you want and feel you can simply and clearly tell the story of grain to glass in that length of time...
There's so many ways you could talk about it...but don't worry about how..just babble the way YOU make beer for three minutes and start from there.