Vimtutor
This tutor is designed to describe enough of the commands that you will be able to easily use Vim as an all-purpose editor.

Vimtutor in Termux on an Android smartphone.
The approximate time required to complete the tutor is 25-30 minutes, depending upon how much time is spent with experimentation.
After apt install vim
, type vimtutor
at the Termux command prompt +enter/return to get started.
See Also
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