The first thing you should do is mentally prepare for this change. Accept that the adjustment process will be difficult and that it is normal to feel stressed. It is important to give yourself time and space to process your emotions and feelings, and allow yourself to cry or grieve when necessary.
Another important thing is to establish a routine. When moving, it's easy to be tempted to stay home all day, but that can increase stress. It's important to create a routine that includes activities you enjoy, such as exercising, reading, or spending time with friends.
It is also important to be surrounded by positive people. As an immigrant you can feel lonely, so it is important to have caring people around you. Find support groups or an expat community in your new city, or consider joining a club or sports team.
Another way to deal with stress is meditation or yoga. These activities can help you relax and focus on the present, which can help you manage the stress and anxiety associated with moving. Ultimately, it's important to remember that the adjustment process takes time and it's important to be patient with yourself. Don't compare yourself to other foreigners who can adapt faster or expect to adapt completely overnight. There will be good days and bad day, and the adjustment process is a journey, not a destination.