Lol, you don't. There's a whole bunch of reasons they enjoy Facebook that you can't replicate outside of it with privacy respecting social media. Mainly, all their friends and other pages they interact with already on Facebook.
This is a pretty frequent question in privacy spaces. The best you can do is manage your own, and maybe talk to them about the risks. Maybe. If they're open to it.
You unfortunately are coming at the problem from the wrong direction.
The only social network they will want to use is the one with all their friends on it; and for the older generations, that's basically just Facebook.
In order to get them to move you'd need to get their friends to move, and in order to get their friends to move, you'll need to get their friends to also move. It's called the network effect and it's why it's incredibly hard for any non-established social networks to gain much of a market share.
Your best bet (which is by no means a guarantee) is to wait for the latest Facebook scandal to be in the news, and chat to them about it whilst they're watching it on TV. Plus add a bit more fuel by doing the ol' "oh this reminds me of something else I was reading a couple of months ago..." And have some other recent scandals in your back pocket to fire out. Bonus points if you can already establish yourself on something like Friendica, which will allow you to say "yeah I quit Facebook a while ago, the company running it just seems skeevy, I've been using friendica instead for a bit now" or something like that
Then you have to hope that registers enough as a talking point amongst them and their friends that it sticks. But you have an uphill struggle ahead with no certainty of success.
Unfortunately there is only one way to get older generations onto a new app: make it the only place where they can see pictures of their grandkids
(I'm serious tho. When you have kids you can get their grandparents to install ANYTHING if you tell them it has pics of the new baby.)
It’s a fool’s errand unfortunately. Users stay in spaces because their friends and social circles are there. It doesn’t really matter how shitty the platform becomes. The social cost of moving is just too high.
The solution is interoperability and some regulation. Unfortunately we have neither. All you can do is inform your mom about the dangers and teach her to recognise propaganda and abuse.
Would recommend reading Cory Doctorow’s book ”Enshittification”
I just told my extended family how they can contact me, and accepted that I’d be out of the loop on some things.
facebook first went to shit around the time kids and grandparents were allowed to join, so ...
Pretty much repeating what's been said here, but a) how does she actually use it beyond her own posting behaviour, and b) who is she talking to?
If she literally just posts random crap on her feed and talks only to kin, a concentrated effort to move family to something like Friendica might be a useful project. If she's interacting with a wider network of friends/acquaintances, community/hobbyist groups, news outlets (you can do that in the States, can't do it in Canada anymore), Facebook games, and various slop vectors, you have a much more challenging task on your hands.
There's a lot of shit on Facebook that's hard to replace in a way people who otherwise don't care about Meta would use. If you're looking to start anywhere, I'd say start setting up a Friendica instance, have a plan to onboard key family members with the least amount of friction possible, seed your own feed with grandma bait, and keep bringing it up ("Oh yeah, [x] was great, I took a lot of pictures, here's the link to my Friendica page. Oh, you need an account? It's just your e-mail, password's GrammyGram@420. I'll show you how to change it*.")
*Not a Friendica user so I dunno how it works in detail, but you get the idea. Also doesn't need to be Friendica specifically, but this one's usually brought up when talking Facebook alternatives specifically.
I made this for me and my family. You self host your own private platform.
Why do you want to do this?
She’s happy. Let her be happy.
What?
Set your own battlefield, do not fall into theirs.
Use popular libre software, a chat app like Signal, over niche social media platforms.
How?
Some like this:
Friendica is an alternative for Facebook. https://friendi.ca/ There's an Android app for it : https://f-droid.org/en/packages/com.livefast.eattrash.raccoonforfriendica
Tell them to delete them.
Fediverse, like Friendica, has servers in america
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