Reddit, I want to be a pen pal to someone. How do I start?

Years ago, when I was in early high school, I volunteered as a pen pal to an older lady who has since passed. Then to another older woman who had no grandchildren, who still emails me from time to time.

The thought struck me the other day to see if I can't start again, by snail mail or email. I'm sort of looking for something along the lines of a volunteer opportunity than r/penpals. Are there any reddit communities or sites?

Thanks!