In your studies, visit this particular arborist related website called Online Seminars.
It's set up so arborists can get online CEUs.
No cost right now.
Anybody can read them or take the test for fun.
I don't post it on rank and file forums where the entire populace can see the link. But this forums here is more of a pro type forum.
Anyway, this is the link...
Online Seminars Tree Articles
You can boost your tree care education with that.
I earned about 10 CEUs there myself.
This month, the first article is one I submitted, taken from my webpage, shown at article's end.
That earns CEUs too - writing an article.