Hello, Elle!
Twitter is available for anyone, but not necessarily for "everyone to see".
It's purpose is "communication".
In my case, I follow around 55 people and when they "tweet" a message it comes up on my Twitter page.
I can choose to reply, or not.
I follow folk/things I am interested in.
Reporters, folk from the sporting world, some history sites, Channel 4 News, the OED, Tayside Police, Loch of the Lowes, Britain's Got Talent, Cycling Weekly, New York Times, Salmon Fishing, Tour de France, RTE, Wild Atlantic Way, A Donegal newspaper,my local football team, etc etc.
Keeps me up to date with folk/things that interest me.
Laura Muir, for instance, has around 23,000 followers.
My account is "private".
No one can see who I follow, and I do not tweet.
I am sure your daughters may be on Twitter?
Sarah is one of the Sky Golf presenters. She's good!
There are several!