Career woman or career wife?

When my husband and I got married, we decided not to work for one year. We have an investment that earns enough to provide for our monthly needs.
My husband is entrepreneurial. I am very much employee-minded. I have fears about creating my own business. I have insecurities about my own abilities and skills. I feel inadequate to become a businesswoman.
But, my husband is very business minded. He is not yet successful but he has good foundations. He has big dreams. He reads a lot of books on business. He tries to learn from successful business people by spending time with them. Somehow, I envy my husband and deep inside I want to follow his path.
So, we decided to make it a goal to have our own business and not to work for other people. A year after we got married, we still took no jobs. I am a full time housewife and I know that a lot of women want to be in my shoes. But, to be honest, I sometimes feel bored and insecure. I see how my friends have advanced in their careers and I sometimes feel envious. I feel like the world is moving on and I am left behind.
Yet, my husband has been given opportunites one after the other. Not that any of them has flown but I see how he seizes those opportunities. I know that someday, he will be blessed. But how bout me? What's my role? I am finding it hard to cope with him. I can't jump around from one opportunity to another waiting which among them will fly. I am a focused person. I need focus and that's the way I excel.
My problem is that I am in the middle of things right now. I don't want to work for others (my husband's mentality has rubbed of on me), yet I don't know how to be a business woman. I can only assist my husband but I am not sure if I can do it on my own. Am I meant to really just be his suitable helper?
Oh God, please help me know where I stand and what I want. This situation in my life is kinda unique. THe lesson is still on its way.
I guess the question I want to post is this:
Which is better, for wives to have a career of their own? Or for them to follow their husband's leading and simply be assistants to them?