As young people increasingly reject social media, older generations increasingly embrace it.
This is like Tesla (and other startups generally) do it. Sell it to the rich people to garner attention, and then slowly when you've got enough growth/money/experience, sell it to others.
Teens were the lead users. Old people are just the laggards in social media.
Also, Facebook (in its infancy) used to be the place where cool teens hung out. Now if it's the place where your grand dad hangs out, it isn't so hip anymore. No surprise that teens would prefer dropping off.
A majority, 54% of teens, said they spend too much time on their phone, and nearly that many – 52% – said they are trying to limit their phone use in various ways.
Knowing is one thing and actually getting rid of it is a completely different ball game.
There's a gulf between the planner and the doer. The far-sighted "planner" in us knows that social media/Netflix/cigarettes are bad for us. When you conduct a survey, we are conscious and reasonable people who know what is good from what is bad and hence 54% of use agrees that we spend too much time on useless stuff.
But when it actually comes to doing, the myopic "doer" part of us keeps on snoozing that alarm clock in the morning and goes to Facebook to check the number of likes & comments received every five minutes.
I'd suggest you to start with Google Sheets. Most of the needs would get fulfilled there. By the time it becomes a hassle you'll know exactly what extra benefits/features you need and which app solves them.
If your notoriety becomes your brand, then why not! Build a brand with your real name and then flaunt it. If you've got a following, (traffic in blog, stars in GitHub project) I bet many would actually want to hire you.