Last month I've played around with Cloudflare Workers and created an A/B testing experiment.
I've started a great CSS course from Josh Comeau. The quality of content is superb and makes it fun to learn with all the interactive demos. This is what a good online course looks like.
Added 2 new questions. In total having 74 questions and 28 commands.
There were 78 unique visitors in the last 30 days. 3 clicks from google and 983 impressions in search console (59 daily maximum).
P.S. I'm ptrlaszlo on twitter, follow me for more stories.