Re: hey everyone here's my plans please tell me what you think!!!
You'll find helpful folks and a lotta good info. I commute to and from work on mine in all but the very worst weather. It's six miles, one way. Comparable to your commute. It's completely do-able.
As far as learning how to get your particular bike really road-worthy is concerned, I'd got to the top of any of these pages and find the "search" box. Then type in "Huffy Cranbrook". That particular model has gotten a lot of discussion around here. You'll find all sorts of suggestions that'll also pertain to your bike.
So good luck and have a blast!