Most of the major vendors, such as Cisco, Microsoft, and CompTIA, offer courses on LinkedIn Learning.
I'd like to see Meraki there as well.
Why am I suggesting this? I usually watch and listen to lectures on my phone when I can't use my laptop. Plus, listening and watching is a good alternative way to learn especially when one is outdoor, and it's easier on the eyes. I know that Meraki courses are light and easy to understand. They're summarized, and the webpage interface itself is nice and not distracting.
As for the topics to be covered, let's say the fundamentals and preparation for the CMSS exams.
Regards