So I'm 65. Ooh that hurts just saying it. I have been playing in earnest with GT for almost three years now and I am amazed at what I can do. I am still a beginner/intermediate depending on the topic but I am making music. I can play several of my 60s-70s songs and found out that I love blues since playing. It's great being able to play songs. But I made sure that I followed the beginner lessons and picked up as much as I could. Only when I throught I knew enough did I start learning songs, and then learning more theory/scales as I needed them.

I have hit many frustrating things as I have progressed. But the trick for me was not only having fun learning songs but having fun learning, period. Don't think of lessons just as a- "I have to go through this stuff or I won't be able to do stuff". Have fun learning. Remember, a bad practice day at guitar is better than a good day at work. Enjoy!