How to deal with homesickness and anxiety of moving to abroad?

Assalamualaikum everyone. How are y'all doing? Okay so one year ago I left to go study abroad (like every other person in the country) and well to say the least I didn't have a pretty good experience. I faced homesickness, due to some personal reasons I faced extreme anxiety and due to everything my academics and mental health suffered greatly.

Well I came back to summer vacations to Pakistan. I tried to transfer to local university. Didn't happen. I am preparing to go again, and everything is kicking back in. All the homesickness, so much anxiety which leads me to feel so nauseated all the time. My main fear is that due to all this my GPA really suffers. I just want to ask how do you guys deal with all this anxiety and homesickness for those who leave their families and move out abroad?