Is it worth it?
For me, it is. I just started my CG journey a scant month+ ago, at the age of 54, so a bit of late-ish start. I have always had a desire to play guitar and love how much beautiful music there is to play in the CGF world. I am also interested in other forms of music - jazz/rock, prog metal etc. and hope to be able to utilize some of the skills I develop learning CG in these other worlds too.
So why is it worth it for me personally? I work more than full-time for a living and it's not like I have much time on my hands. Making the time every day to learn and play is hard and requires a ton of discipline. There are days when I attempt/struggle to read and play a simple piece from the RCM Beginning Repertoire book and then I see someone like Per-Olov Kindgren play Ave Maria on Youtube. It can be a demoralizing experience and I have often asked myself if trying to learn CG at this age is just plain silly on my part. What keeps me going is the sheer challenge of learning to read music, learning theory and the physical skills in both hands. My hope is that all this effort is knitting a huge number of new neural connections and synaptic pathways, enhancing what is already there, and hopefully bringing the benefits to all other areas of my life, in addition to the satisfaction of actually playing music. After five decades of muddling through life, I think I've begun to learn the meaning and implications of the idea that it is the journey that matters, not necessarily the destination. I think there is joy in undertaking a non-trivial journey and then making progress on that path, howsoever small that progress may be. CG is definitely that journey for me.
Finally, I am glad that I don't have to do this for a living! With my level of talent, I am pretty sure my family would starve! It is wonderful that we live in world where we can pursue hobbies like CG.