Missed my edit window
I was hesitant to share this, but then after posting thought 'why not?'
Back in my younger years (late teen/young adult) when I was done with high school and trying to figure out what was next in life, when I literally had 'all the time in the world' (depending on the season of life, between work and classes at the community college) I often sat bored and thinking of all the things I could be doing with my free time (volunteer wise), but I too was hesitant.
So, to answer my own question: Why?
Well, sometimes it was lack of motivation so to say. Well, maybe not lack of motivation, motivation was certainly there or I wouldn't have been thinking about it. But what is it that causes a person to sit and think and dream, but never actually follow through? (To answer that for myself here would mean high jacking your thread and getting into to much personal info for open forums

)
Another factor that held me back: the negative people in my life. I had a lot of them (even within the church).
"Oh that's too much work"
"That's too hard for you"
"You'll never have time to rest"
"You'll never have time for yourself"
"You don't know how to do that"
The negativity went on and on and on.
Don't surround yourself with negative people.
Here I am a few decades later, and I often wonder what might've been? What opportunities might have come forth? What new skills might I have gained? Actually, I try not to dwell on that too much.
These days my 'free time' is very few and far between. Marriage takes time, parenting takes time. Life just takes time. The time for volunteer activities just isn't there like it used to be. Although, sometimes, we find opportunities to do volunteer projects as a family, and that's pretty neat too.