Hi JOhn,
I would request you to try this one,
https://wordpress.org/plugins/moowoodle/
GIT- https://github.com/dualcube/moowoodle
The process this plugin associates with your Woo-Moodle setup is completely automatic. Once you setup the plugin in WordPress/Woo and the activate the webservice in Moodle, you are good to go with the course selling. Best part is its completely free of cost! Please do reach out to me in case you need any assistance at all.
Thanks and Regards,
Arindam