advise please

You might want to practice rebooting alone before school. If your having trouble now than it's only gonna get harder when your around other people.

As far as socializing more is concerned, try joining a club or a free activity, something that forces people to engage with you in conversation. I play a trading card game so once a week I gather together with people to play. Something like that but with something you enjoy to do.

 

Start NoFap now. Why start when everyone else starts, when you’ve already prepared and already know what to do and expect?
I recommend to start with positive habits now, then start planning on how your entire semester will go during late August (if you want to).
It’s like learning how to play a game. You could learn now, or you could learn while you and your friends are playing. Better to learn and beat your friends when it’s time.

 

To socialize better for now is to understand all of the principles of what friendship is based upon, and so on. You want to expand your knowledge on the subject during this free period of time. You might also want to try to take time to learn about different types of people and the mind. For a course on friendship, there’s a YouTuber by the name of “***” starting his own new series called “Beefriend”, which is a course on understanding and learning on how to build rapport and creating stable friendships. I recommend you check it out.