You are never too old to start playing guitar! Certainly, you will read about the guitar heroes we all admire, and how they started when they were like 6! some were 4... But that's not the case for most guitar players. It seems that large group of folks who are started 20 and loving it. It's a wonderful hobby anyway.I have had a few students in their 40s that started jamming regularly after they acquired the basics! Some even considered side hustle in music. They were crushing it!