This happened when I was a kid as well, also terracotta, but the tree was a cedar, my father did exactly what you plan to do and the tree wasn’t the same after, but did live. Maples are top feeders(?) and compete with the grass for nutrients AFAIK, so probably will be rather hard on it. My arborist came out for free and took an hour talking about each of the trees in the property before his crew came out to do trimming and take one down, I’d assume that’s common practice, so I’d get a pro out and get their advice. Good luck.

Good luck! You’ve got this, I’m sure you have learned from your first go. And agreed pearson sucks, always hate doing my certs.