If you want to start a business, start a business. So you don't have enough capital to do what you want right away? Duh, that's called a long-term plan.
Phase one is to start up SOMETHING right away. Sell something. Anything. Be sure you make a profit. A neighbor of mine sells leaves. Seriously. Leaves off the trees, nicely pressed. If they can sell that, surely you can come up with SOMETHING to sell.
Phase two is to take that initial success and move in gradually in the direction of your great wonderful business idea. If your idea is (for example) a new kind of ice cream, sell something that has something to do with ice cream. That covers a lot of territory. Surely you can think of something.
Continue phase two until you have made a decent amount of money, a lot of contacts in your chosen business field, and you have successfully dealt with all the paperwork, taxes, employees, shipping, etc etc or in other words you have become a good manager.
Phase three is to do something bigger. Hopefully you have made enough progress to start at your beloved original idea. If not, however, do something that is even closer than what you did back in phase two. Continue your success.
Sounds like work? It is. Congrats.