I haven't as yet started working yet I have been studying in Britain for the past year. I am fortunate that I am fluent in English. Also, I had managed to aquire some good friends via this site.
However, not being able to go home on the weekend, ring a mate or any thing like that is painful. I had some family hassles last year and I nearly chucked it all in to go home. Don't underestimate the sense of isolation. Make some friends as soon as you can so you aren't by yourself all the time. Use the internet to send emails etc home and if possible, get your family on line too. Regular contact helps.
Good luck.