Mass adoption won’t come easily. People treat social media just like broadcast and print mass media: they want to follow big names and brands. It’s a change in mindset looking for niche communities instead. Look at Bluesky, it didn’t really take off until big Twitter accounts moved and brought their minions with them.

Using computers since before GUI was available… Sometimes I think we ought to go back to it

It’s all about the instance. For the Lemmy instance I chose I had to write a few sentences. For mastodon I had to provide a picture of my SubGenius pastor card. I intentionally picked ones that had requirements.

If you had installed bazzite those kids would worship you

Late to the party, but I’ve read that OP is going to be the sole admin. Do Not Do This. I admire what you are trying to do, but ultimately, you will have no rest, no vacation, no backup for yourself. The hardware & software aren’t the issue here - it is the human support of those services. You will put a single point of failure on yourself, and likewise your peers.

Many of the FOSS projects you mentioned have commercial services. SAAS exists for a reason. By subscribing to those services as a business, you underwrite their ability to provide the software for free to the community. It’s a win-win.

I just use SMB shares on my NAS. Why over think it?