Advice on possible future move to the US?

Dear All, I currently work for the British RAF and my wife is a trainee Radiotherapist. Our hopes, on my wife qualifying and me leaving the military is to (fingers crossed) emigrate to the US. It will be on the basis my wife can get employment sponsorship on the back of work placements in the US during her degree. This will not be for a few years yet, but being new to reading about emigration to the US, I want to give both of us the best chances of successfully moving. So to that end, you help is both needed and appreciated . My questions are as follows: - I understand that as 'spouse', I will be unable to work for a period of time. how long is this, and what can I do during this period to enhance my employment prospects once the period lapses? - Will having a degree improve my status? - Given we would ultimately be buying a house, a good credit rating is no doubt required. Whilst maintaining a good score in the UK is a given, are there any things I can do now that once in the US will help me? For example, I have read things about getting American Express cards etc.... I don't want to sound naive, but looking for education and good advice here. There are no doubt a lot of other things I need to consider, but strengthening my/our profile will undoubtedly assist us. You kind help is much appreciated.. Russ