Do another search on this site, business plans and templates for such have been on and around here, and you can easily find them on Google.
But before you get too far, let's nudge you with a dose of reality. You've gotten stalled and can't figure out how to write a business plan when there are literally hundreds of sources to do so, AND you say you want to start and run a business. If you want to have any chance of starting and just merely surviving, you'd better be able to take some initiative and LOOK, READ, OBSERVE, and TAKE ACTION on your own. Otherwise, whatever money you do have you should wave good-bye to now.
Keep that in mind. Get irritated and then motivated. Now do something about it!
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How to raise money.
Yourself by way of hard work, shrewd investments, or paid medical experiments.

People who love you.
Heavily collateralized loan. If you are not willing to "risk it all," you can't expect others (such as a bank) to do it either. There are many good SBA or micro-loans through your local city or state as well. Find the local Small Business Center or Chamber of Commerce and they may have resources and tools for you.
Anyone who says there are grants is lying to you.
Create luck through hard work, and then make the best of it.