The phrase "started schooling" is correct and usable in written English
You could use it in a sentence such as, "At the age of seven, I started schooling."
"If he had made one mistake when we started schooling him we wouldn't have.
Walsh said: "He wasn't right at Christmas, but from the first time we started schooling him I was taken with him.
Although the ages of the children vary and may overlap between grades, we were only concerned about the number of years of schooling experience they had (i.e., all children in a particular grade started schooling at the same time, regardless of age).
He's been gelded since he joined us, has just started schooling and should be ready to run in some nice juvenile hurdles from November.
Before Haluk started schooling, both his mother and her aunts researched the best schools in Amsterdam.
As children became more independent and started schooling, other non-resident relatives such as grandparents and aunts increasingly contributed to childcare.
