First of all, the most important first step is that you need to get used to the British eating habits. The biggest difference between east and west lies in diet. You are used to the life of rice, but suddenly you can't adapt to it for a while, so you must change your diet first. Only when your diet is adjusted will you have more things to adapt to other places. After all, eating delicious food will make people feel better.
Secondly, you can take part in more social activities at school or in society. After all, being alone in a country, not to mention a country or a city, will be particularly painful. So, take part in more activities, get to know more people, whether they are studying abroad or people from Britain or other countries, and try to get along with others, so that when you are not alone, you won't feel out of place in this country.
Finally, there are many beautiful scenery in Britain. There is nothing wrong with going out for a walk when you are alone. See different scenery, feel different air and relax.
The above is Xiaobian's introduction on how to quickly adapt to studying in the UK. This question gives you an answer.