It depends on what you want to achieve.

Vi and it’s descendants are brilliant editors for a programmer but not for writing prose. So stay away from them. ;-)

Do you want just to write text without being distracted by an overwhelming gui or are you fine with the hint at options?

Do you want to write in a terminal?

How much do you want to format while typing? By typing the format commands into the text or by clicking on buttons or ctrl-key magic?

Do you need version control?

For each of your combination of answers there are different solutions.

I used testing for ages, it is really stable. Only the phase after a feature freeze for the release of a stable version can be a bit shaky. For some weeks I just change my repos to the stable version.

That is standard in all of Debian, just get it as a flatpack.

I can’t go past the cookie banner with Firefox. Chrome optimised?

But the project can be found at https://openrgb.org/

Same story, same tips, but I started with SuSE Linux 4.3 in 1996. Just try stuff, read the error messages, read docs and ask. A lot of peaople who know stuff are happy to help out of altruism or the chance to show off. ;-)

You can’t delete a mail you sent me, nor put your hand written letter to me in the bin. I can keep both and I can keep your name and addresses in my little black book. So there isn’t even that level of privacy in the real old fashioned communication.

And communication over the Internet was always the subject of storage. Your mail may be on the backup tape of a mail server. Your usenet posting is on archive.

So the assumption that the fediverse can forget….