Now that you are determined, get yourself an idea. Then plan. Planning is absolutely important.
Now you have a product in mind and also the procedure to go through. Now comes the easiest part, gathering money. You can get loans, woo investors, sell your house etc..; Planning is followed by organizing. Then comes staffing, directing and controlling.
I think service businesses are evergreen and will never run out of demand. So think in that way.
The stronger a light shines the darker are the shadows around it.