Just my two cents… But I think the best thing you could do keep an electronic video journal.
Doesn’t have to be on the Internet
Get an iPad, sit down each day for an hour or so, turn on the camera, and record yourself and your life… tell your story.
Make sure your son knows how to access it.
I think that’s the best thing you can do without giving up any of your personal data or privacy on the Internet.
There may be better ideas out there, but that seems the most private, AND the most personal thing you can leave for your family.
For the record, it’s what I’ve been doing since my grandchildren were born a few years ago… One way or the other, they will know that pop pop loved them and was here for a while.
I have looked around and there are a TON of used/refurbished ipads for a C-note and thereabouts . . . very affordable, AND I have the leisure and comfort to record when I please . . . and maintain relative continuity.
I know nothing of what the RAM is capable of, but 32gb seems to be a standard.
Can 32 gb record the equivalent of an hour's worth of viewing? . . . I'd want to carry the thing around and record as I'm struck with a memory which should make for more interesting viewing/listening.
If this works out, I can purchase 5 (children) units and when it's all done (on my deathbed ? . . .why not? . . hmmm) . . . the one master will then be transcribed to the other 5.