Welcome!
As long as you're still breathing and in control of your motor skills and mental faculties(grin), it's never too late to learn something new - especially guitar.
The first thing you need to do is figure out what play style you want to learn. There's really only two - fingerpicking, and using a pick. Strumming is merely a technique used to play chords. Do you want to learn how to fingerpick, use a pick, or both?
Once you figure that out, if you're not feeling too pressed for time before God summons you home (wink), you may want to spend the first week or so conditioning your hands. Just as athletes need to condition their bodies, guitarists need to condition their hands. Your hands need to be able to work together in order to create some semblance of music. Otherwise, you'll likely grow pretty frustrated rather quickly. When I started taking Classical guitar lessons in 2003, my teacher had me spend the first week of practice doing nothing but finger stretching exercises for 30 minutes every day while fingerpicking the strings. After that, I made those same exercises part of my regular routine for the first 15 minutes of every practice session. I was surprised to learn that GuitarTricks doesn't have any lessons on the subject - at least, I didn't see any. Thankfully, there are a number of videos on YouTube, but I recommend this one, as the teacher explains why they're so important. In fact, the chromatic exercise he demonstrates is one of the first exercises I was taught:
http://www.youtube.com/watch?v=LmR_MIOCF9k&feature=relatedI also recommend watching this video on the best way to practice guitar. It offers extremely useful advice on how to avoid getting into bad habits so you can play more comfortably and sound better.
http://www.youtube.com/watch?v=dYIAkKUxcOI&feature=relmfuAs for which lessons to begin with here on GuitarTricks, based on what you described about your familiarity with guitar, I recommend starting with the
Guitar Fundamentals. The concepts may seem rather drab, but they'll give you the foundation you'll need to learn how to play your favorite songs. Ever seen "The Karate Kid"? Think "wax on, wax off", and you'll get the idea. ;)