Starting off a new project or career is never an easy experience. I for one can tell you that for a fact. The skills, capital and connections necessary for the project's execution and success might not be automatically available to you when you most need them and if they are, more often than not we never have the right people around us or they are there and simply not willing to help out.

One lesson I have learnt is to never give up. It never makes sense at the time but with time you realize why good and successful  endeavors don't come easy. If however you end up in the minority who never easily give up you'll reap your most deserved success. Ever heard of a story about the mine owner who gave up and sold his mine only ten days before hitting the diamonds he had longed to mine? Well I hope you never end up committing suicide like he did because he let go alittle too early.

Never overwhelm yourself  thinking about the entire project and whether or not it will work. Most successful projects and companies were started off by one person who saw the successful end product at the very beginning and took his challenges and failures as lessons on how not to manage the project.
If you learn how to get up everytime you fall, failure will get tired of getting in your way and you'll end up as one of the many success stories out there. Embrace the worrior attitude today, pray for success, give your best to the task at hand and I believe the God who gave you the "big seemingly impossible" idea will help you execute it. 
Build what you can with what you have, and as you acquire additional resources, build upon what you have already built.