I created https://vtip.43z.one to help me learn vim one tip at a time. It's just 3 lines of vim script that if called will show you nice tip like

Use Ctrl+n to open the auto-complete menu while typing.

Press zz to center the current line in the visible window.

Use G to move to the end of the file.

    function! Vtip()
      echomsg system('curl -s -m 3 https://vtip.43z.one')
    endfunction