If you have been wanting to play for that many years, you have the desire. I started when I was 62, youngin', so If I can, YOU can. Good luck. Perserverance is desire's best companion. Be patient with yourself. This is a great way to learn, best I have seen. Make sure you are comfortable in the position you are playing. For me, the chair is important, having a foot elevation of some kind helps, I even bought a crescent shaped pillow that helps to hold the guitar at the right angle, so you can relax and minimize the stress, which sneaks into your playing if you are not relaxed.