Get to the emotional reasons why they hold one or more of the dissonant beliefs, then try to both make them feel heard and to plant a seed for addressing that emotion, while offering a non-dissonant alternative
@Aurora: I think most Pixelfed instances/apps have a way to block NSFW content. You'll have to make sure your sister has NSFW content blocking on (and keeps it on) and you'll want to check in with her every now and then about her experience there. I think marking images as NSFW is optional for the person posting the content, so not every single NSFW image will necessarily be blocked. It's hard to give someone a completely clean social media experience.
One other thing you can try: look for instances that are focused on a topic your sister enjoys that is not likely to have NSFW content in it, like ppl who are interested in trains or playing a musical instrument. There are some here: https://fediverse.party/en/portal/servers/ (but you should check the server before she joins)
to all the commenters saying the fediverse is not a good place: these kids are going to be on social media, one way or another. It could be tiktok, bluesky, snapchat, or whatever else they can get onto. Some (but not all) parts of the fediverse should be accessible to them. Ofc that means someone has to do the hard work of hosting those instances, which is not easy. Just saying "this isn't for you" isn't doing teens or the fediverse or parents any favors.
That's hard. Another solution, if it's a laptop, is to have him mail it to you. Mailing a computer internationally 2 ways (a) will take a long time and (b) requires very, very good packing
Socialism would certainly work better than capitalism does. Under capitalism, because every company is driven to increase profits and the rate of profits, we have tons and tons of:
Production of shit we don't need (which people buy because of desire manufactured by marketing and a sense of having little control or meaning in their lives)
Overproduction of shit we do need (e.g. fast fashion)
The replacement of diversity with monoculture everywhere, making ecosystems less resilient and outright destroying them
War for resources among competing empires and companies
In a socialist society (and, I would argue, a [libertarian socialist](https://en.wikipedia.org/wiki/Libertarian_socialism society) society in which there were systems in place to prevent the accumulation of power), the base incentives of the system should be to fulfill human needs and promote human flourishing, as part of a web of ecosystems on Earth, and not to make a profit.
Here are a few examples of how that would make society much more efficient in its use of resources:
Instead of growing mostly crops to feed livestock, produce corn syrup and other flavorings/additives, and ethanol (as we do in the US); we could grow a greater diversity of human-edible, nutritious food.
We wouldn't need to manufacture desire for consumption through marketing
We wouldn't have to fight or exploit each other to gain market access
Programs like universal free healthcare would make for a healthier population that would need less emergency medical care
People would have more agency in their own lives and more say over the decisions that affect their community, which would provide a level of satisfaction that would reduce "retail therapy"
I would also argue that there is no true socialism if it is not anti-hierarchical, which includes liberation and full bodily autonomy for everyone having childbearing anatomy. Among other things, that means the right to choose when and when not to have a child.
If we could achieve a libertarian socialist commune-of-communes in which we could guarantee ourselves and each other a dignified and abundant standard of living, in which we could provide for the varying needs of different kinds of people instead of demanding that we fit one or two pre-approved molds, and which has mechanisms to prevent the accumulation of power, then I think we can turn to questions about the number of humans who can exist on Earth, how we might travel the stars to find/create additional homes, and so on.
Get to the emotional reasons why they hold one or more of the dissonant beliefs, then try to both make them feel heard and to plant a seed for addressing that emotion, while offering a non-dissonant alternative