Channel, processes and operators sections

[chriswyatt1]

The channel, processes and operators sections are pretty much copy and paste from the docs.

These sections could be way more interactive, building on the previous sections and be less dry than at present.

e.g. all channel types tested in the processes section, to see how they have been used.

Personally, I think I found this all tricky to grasp when I did the training. Having real world examples as exercises could help bring this section to life.