Joplin server is available for anyone to host themselves. If you don't find the documentation sufficient, maybe you can find extra install information on this forum? I know others have asked about it in the past.
Joolin cloud is just a Joplin server hosted by the Joplin company, so there isn't really difference to the user. If you're worried about hosting location or the shared host, perhaps you can contact them and work out a deal (I don't know if they do that).
support@joplincloud.com
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