Hi Kevin. Welcome to the forum.
My first question would have to be; how long before I progress from being absolutely awfully crap to , say, being a reasonabley plain bad guitarist?
It's taken me 26 years so far ;D. Seriously though, that depends entirely on you and how much you put into it. Some folk learn quicker than others, most do better with a teacher and a structured lesson plan. Regardless of how quickly you learn, the more you practice, the quicker you'll progress.
Guitar is a nice instrument in that the basics are pretty easy to learn, you can be up and strumming away at basic songs in a few lessons. However, refining that will take you the rest of your life.