Seriously if I had a son who was starting 1st grade school this is what I would guide him :
"Son listen, if you want to succeed in life focus only on studies, don't talk to anyobe or be "friends" with anyone only listen carefully to the teacher and if you have questions about the material ask her. Now during breaks between classess when all the social -slaves of that are the other kids go out to play, sit in class and study the material, it's a great time to study.
And when you go home also study, and all year long study, including weekends and all holidays including chritsmas eve and day.
The goal son is to have perfect grades, not to have "friends", like the rest of the social slaves who are losers.