To whom much is given much is expected. Just obey what you know now. We live in the now, and today has enough problems, tommorow will have its own problems. When we see a promise in the bible from God we see obedience from a believer. Take for instance abraham. He took his son up the mountian first. God will test us. Its all about now, right here right now. What ever His plan is Its His plan. He will bring it to pass. Just focus on Him. The gift giver is greater than the gift. Your calling will become clear to you in time, but thats later. You are still here, in the now. Still pray about it, yes. And ask Him to use you for His glory. But if you pray this be prepared to trust Him totaly, even if it means doing something you are not comfortable with, for instance speaking to pharoh.