Hi
I was in the same position and got offered a job in Vermont, for when I graduated. Unfortunately the American Board which assesses your education openly told me I shouldn't have been offered the job because there are Americans qualified to do the job.
Sorry to be so bleak but they will put every obstacle they can find in front of you.
Education wise - check the National Qualifications Framework and find courses or certificates level 3 and above. If you can try and do some online level 3 courses to increase your points they may stand you in good stead.
The Americans will insist on 1 year work experience or a lot of educational points to make up for their 4 year degree.
I hope that helps, perserverance is the key.
Good luck