I would suggest using just org, it seems to me that it has everything you need for a personal wiki.
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Quick pain-saver tip
org-roam
What is wrong with just using org-roam?
org-roam can do what you want.
If you have one big file now you can use org-roam to create nodes for the relevant sub-heading which can be linked to from elsewhere. These nodes can eventually be moved to their own files when you need.
You may also find the roam ref feature useful for external references/documents.
What about if I want to capture multiple pieces of information as different nodes under the same headline?
A node id is a property under the file or org-headline so I don't think you can add multiple nodes to a single headline. Maybe if you explain your use case a bit, there might be a better suggestion?
If the bits of info are different enough then the best bet would be to have them as separate sub-headings. If bits of into are mostly related then you could consider either using aliases or tags.
Combination of org-roam and org-roam-ui with citar.
Outside of the org box you can use gemini-mode, Gemini Protocol an evolution in between gopher and the web, and the elpher Gemini browser.
If you have only one big org file, you can generate links by creating radio targets. Also, you can open the file at Emacs startup by customizing initial-buffer-choice
.