Looking ahead and being overwhelmed

This passed Thursday my parents called me to update me on the goings on of my family and home town area and one thing that came up was a company that has people working at it who my father knows. So he said he would get me contact info for it and stuff. It’s an oil company, so it is one of the possibilities I have been considering; but it just seems like my future seems so much more important now then it did before. Whatever skills I choose to develop in my few years of work in the US are going to be the ones I can most easily transfer to the people I work with. Now my current three main possibilities with advantages of each are: oil, I can get into many closed countries easily; pharmaceuticals, I can learn how to make cheap medicines for people; waste treatment, I can help these communities to develop good, clean water works. And still then there are more possibilities with such things as food processing where I could learn how to make healthy clean food for the people I work with.
I’m very grateful for how much God has led me already; but now as I see better how more things can be applied to the benefit of those who I work with, I’m just getting more and more confused as to what exactly I’m supposed to do. On one very good note God has been very faithful recently in sending people to talk to me about things that actually listen and pay attention when I talk about my experiences and my future, so I’ve been having better opportunities to talk with people about these things; but at this point that has really only opened up more possibilities. I’m really hoping that as I start to check into these things God will close doors that I’m not supposed to take, but right now my future just seems so wide open. I know that this would be a lovely problem for some people, but when I think about the fact that I will be transferring skills to people who would have no chance to receive these skills I get so afraid of screwing up God’s plan for me in these people’s lives. It may be foolish and prideful to think that I can screw up God’s plan, but it seems plenty real to me at this major cross roads of applying for internships which will decide what skills I have to take to people in urban slums…please just pray that God would lead me and that I would listen and have confidence in the decisions He leads me to.