I am also 55. I have been with GT for 2 1/2 years. I've completed Fundamentals 1 and 2, Rock 1, Blues 1, in the middle of Country 1, and learned about 15 songs. I was a total beginner but have learned a lot and had a blast the entire time.

Yes, there are things that are difficult to do. I don't think I ever got through a practice lession perfectly. Playing things over and over, especially slowed down, is the only way to learn. As you go along with the lessons, you will have those aha moments when your fingers/brain connect and you can all of the sudden do it. This happened to me with the song "I Get it Now". I struggled and struggled with that, playing it clean and keeping up with the lesson until one day, I got it.

Stay with it.