update README

README.md

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 # wk-extra
 
-Extra contents beyond WaniKani
+Extra contents beyond [WaniKani](https://www.wanikani.com).
 
-For the actual handmade contents, go to [/docs](/docs).
+## [A list of kanji with common components that aren’t Wanikani radicals](https://community.wanikani.com/t/x/56335)
+
+- [List of Wanikani kanji that can serve as radicals](/docs/kanji/radicalized-kanji.md)
+- [List of non-Wanikani kanji that can serve as radicals](https://git.polv.cc/polv/wk-extra/issues/2)
+- [List of Wanikani kanji with obvious common components that don't seem to be kanji (images)](https://git.polv.cc/polv/wk-extra/issues/1)
+
+Note that the latter two are [Git issues](https://git.polv.cc/polv/wk-extra/issues), which are not only open up to suggestions, but also that images can be pasted / uploaded.
+
+## Intentions and Future Directions
+
+This repo is an intention and a notebook to study Kanji characters, that is, similar to what WaniKani intends to do.
+
+However, I am by no means intend to limit myself to Kanji taught by WaniKani, nor the readings or the associated vocabularies. Though, I am not particularly interested in learning Kanji specifically right now.
+
+I also consider stepping into fonts' territory, if I deem that necessary; for example, if [Han unification](https://en.wikipedia.org/wiki/Han_unification#Examples_of_language-dependent_glyphs) changes Kanji to an unexceptable Chinese variant.
+
+- Another case is, if the textbook form (of the Kanji) is sufficiently different from other common forms.
+- I will create a full website, if necessary to render "fonts".
+
+It is also possible that I will add Chinese contents (Hanzi) in the future.