Maybe, I’m not sure because I don’t really have much knowledge on self-hosting. I did find this on their website though so you could start here:

https://www.libreoffice.org/download/libreoffice-online/

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Does it have to be online? If not then you can try LibreOffice Impress. Otherwise not sure.

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Just because someone has more skills, experience or information doesn’t mean that person has or should have authority over others. There are even situations where having more of those things can become a hindrance because it biases the person to doing things a certain way when someone from an outside perspective could handle the situation in a different, possibly better way.

It still should be on the individual to decide whether they want to defer to the experts depending on the situation. The reason why people can come to collective decisions and rely on other people’s knowledge is because they have shared purpose and trust each other to be working to similar goals. That is what makes people’s choices voluntary.

I don’t believe we should uphold hierarchies in any form instead we should help teach people to reason through when to trust other people’s judgements which doesn’t rely on defaulting to an authority.

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In a solarpunk future I’d hope we’d have the technology to have buildings that grow according to how they are used. That would be awesome.

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Any hardened version of Firefox, like LibreWolf, would be my main choice.

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