Education will pay
I too believe that education will pay off greatly for arborist work.
I'm 15 and I find this type of work very interesting and I would like to go to college to learn more about it. But as of now, I don't mess with this type of work because I know absolutely nothing about it. It's too dangerous and risky to try without any knowledge. For lawn work, you basically just run a mower, not too difficult, but it too can have it's challenges, how to kill weeds and not kill the whole lawn, how to get rid of pests and insects, etc. etc.
All types of work require some skill and knowledge, and a good education and lots of work experience is the key to success.
Hank