I wonder what he did once he obtained his B.A.?
And once he married where was he and what occupation did he have?
As for George's important care up to the age of 16?
The majority of his uncles and aunts had already passed away.
These are only my opinions based on a typical life of a gentleman of the time.
George would have had a nurse and perhaps a governess during his early childhood.
From around age 8 he would have had a tutor or attended school. It may have been a day school if there was one within travelling distance. If it was too far to travel each day, he may have stayed at the school or in nearby lodgings for each school week and travelled home for weekends. (Wherever home was after deaths of his father and grandmother and remarriage of his stepmother.) He may have gone to a boarding school. Any of those things may have happened even if a boy's parents were alive. It was believed that boys should move away from female influence sometime between ages 7-11, otherwise they risked growing up "soft". They had to learn to become "manly".
George was probably sent to public school from around age 13. We know his great-uncle Lawrence was a pupil at Eton. Do you know which school, if any, George's father and grandfather attended? The only reference to Sir George's education I saw was that his father ensured he was educated as a gentleman and that he did well at his studies and was intended for a law career.
Benefits of a public school weren't just education but also meeting and mixing with other boys of similar social class and their families, making useful friendships.
A well-off young man might go on a Grand Tour of Europe. It was a sort of 18th century gap year for posh boys. He would have been accompanied by an older man, perhaps a tutor or another responsible man. As George started at Cambridge aged 16, his Grand Tour, if he went on one would likely have been after graduation.
How wealthy was George? What was the size of his inheritance from Dad and Grandma? Could he live off it? Did the estate in Canterbury provide an income? Were there other properties? Investments? What did his wife bring to the marriage?
If George didn't have to work he might have spent his time managing his estate, being a country gentleman, socialising in the county and in Town, entertaining visitors who came to stay and likewise visiting their homes, sporting pursuits, possibly cultivating political influence.
Was anything happening to his property at Canterbury between his majority and death, e.g. improvements to house or grounds, buying, selling or enclosing land?
What was happening in polite society in Canterbury and Kent at the time?
What was his wife's family doing? Business, politics, sport?