It's hard to tell someone when they'll be able to play. It depends on how quickly a person picks it up, how often they practice, etc. But if you think of it being "about the journey and not the destination", and practice regularly, I think you find it very rewarding and you'll learn to play. Improvement never ends as long as you're playing and learning something new.

I think Guitar Tricks is the most valuable tool available to beginner guitarists today, and it can take you far.