There are fiances that have been affected by the economy several times and are not able to contribute to the wedding. If this is the case of your fiance, continue to support him and encourage him to continue to seek employment. It is hard when a man is not working because they are even harder on themselves because they believe they should be the provider.
As his future wife, the best thing you can do is encourage him and let him know that you are in this together. Speak life to him and say he will get the right job and it will pay what you need. If you and your fiance can think of the money now as your money, then you will be that much more ahead then if you are still in the mindset of yours and his, then once you are married it becoming ours.
Lessons you can learn right now are how to compromise, how to shop wisely and purchase your needs versus your wants. You can also learn how to be supportive of each other and work together. It is important that if you have a place together now that he also helps out with the household upkeep so that you do not have to work all day, come home clean and cook dinner. Will some future wives do that? Yes they will and then reach a point where they are burned out.
Communication with your future spouse is always going to be important. Talk WITH your future spouse and not AT them there is such a difference. Remember you are on the same team not opponents. I want to say this as well, if your family and close friends know your fiance is not working, DO NOT let them talk negative about him to you by any means.