Controlling Mopidy with a voice component

First of all, I am new to Home Assistant and thus looking forward to your help.

What I am trying to setup is the following configuration:

a) run Home Assistant on my Pi 3
b) run a mopidy server with different mopidy extensions such as Spotify, Youtube or SoundCloud
(already have (a) and (b) set up)
c) use a voice component (preferably google assistant) to voice control mopidy (e.g. play songs/artists/playlists from spotify/youtube/soundcloud)

Especially c) seems pretty hard for me without having any knowledge of home assistant. So I hope you guys can give me some advice on how to realise my idea.

If it makes everything a lot easier I would also be happy with just Spotify instead of mopidy with Spotify extension.