To learn Duik I went looking for a tutorial, as the official tutorials are expensive, on YouTube. First I found a video explaining how to work the body rig.
Eventually I found a video, unfortunately the video is in Spanish but I used the translate tool on YouTube and just from seeing what was happening I manage to piece together how to work the sliders.
Using this video I was able to make the assets for the body, basing them on the same system. To then test them I followed the video and rigged with Duik.
I also looked into Character Animator for live animating of the head assets, I created a small video of my character talking with me and tracking my heads. As well as adding physics to the hair to seem more life-like.