@davidmaddock there's no algorithms, so you need to follow people, set up tabs with hashtags/follow hashtags, and engage with people, to get any value from the Fediverse.
@FediTips is always good to follow for info or to ask questions
@davidmaddock Welcome to the Fediverse!
Your post appeared in my feed because you tagged it #linux, which is one of the tags I follow. I'm on a completely different Mastodon instance to you, run voluntarily by a completely different person, but because Mastodon instances all talk to each other, I was still able to see your message. It's like a whole bunch of different Twitters, all interconnected!
This approach of loosely connecting different instances together is called "federation". It has advantages and disadvantages. The main advantage is decentralization (no one company owning your entire social apparatus). A key disadvantage is that if your instance closes down for whatever reason, you lose your account and all your posts - however, you can mitigate this by backing up and transferring your account, if you get enough warning.
Mastodon is intentionally built without algorithms - you decide exactly what you want to see. This requires more effort, but gives you more freedom.
Welcome! 👋
I know things work a bit differently here but it does get easier 🙂
If you have any specific questions about using this place, do feel free to ask!
There's also a website which has lots of non-technical help and step-by-step guides for new people at https://fedi.tips
@davidmaddock If you're big on Bluesky, you might want to look at Wafrn, not too many instances there, but it works with Bluesky, you can link your accounts and post to both.