My theory is this, "No matter the age, if you dedicate your time to learning a certain craft, you will get better at it."
Me and Neblix, for example, might have been working on music for the same number of years, but I might have been putting in more of my personal time within those six years. He might have been in high school and working part-time or something, I was in college slacking off. So, I had more free time to dedicate to my music within those six years.
Damn, now I feel old after saying that.
Since you are older, you may have more responsibilities than many of us. So, you might not have the time and patience to learn how to work with music. That doesn't mean there is something wrong with your brain, it just means you are not focused on music.
FOCUS DANIELSON!!!