I'm not Polish but I can tell you what my Polish friends did here in the UK.
All of them came over with a little bit of money to live for about a month or so, got a house or shared with people that were already over here and then went to employment agencies and found work that way. The trouble with that is at this time of year the employment agencies are very slow because it's just after christmas. In about a couple of weeks the agencies will start to get a lot busier and so there will be a far better chance of finding a job quickly.
I hope that helps you a little bit