There were several options for the education of boys. Some attended public schools such as Eton, Harrow, or Rugby, some were sent to a small school for boys, some were educated by the local clergyman, and others (many of them heirs to a title, but not all by any means) were educated at home by a tutor. A tutor took over from a governess when a boy was about 8 years of age and would be responsible for the child’s education until the boy was deemed educated enough or through the preparation for university examination. It’s important to note that a university education was not considered as necessary to a male’s education as it is now.
Tutors were always male and university educated. Many of them had studied to be clergymen. They would be well versed in Greek, Latin, French, German, and possibly Italian, higher maths, history, politics, geography, literature, philosophy, and religion.
Tutors were generally well-paid and respected.
My favorite tutor in Regency fiction is Doctor Sylvester, hired to educate the step-sons of the titular heroine in The Duchess of Asherwood, by Mary Garratt
I’ll have to look at the book.