At the very bottom of https://noteself.github.io/ front page, there is a (small font size) statement reading:
Although NoteSelf is more of a TiddlyWiki version than a mere plugin, if you are only interested on the plugin itself, there is also a method for [[installing the plugin|$:/plugins/danielo515/tiddlypouch/Installation]] into your own TiddlyWiki.
…but that linked tiddler is missing.
<:-)