Overwhelmingly most (as in 99.99%) of entrepreneurs first draw from their savings, credit card, loans, and friends & family.
Angel investors tend to come in your next stage; after you’ve started the business. Venture Capitalist isn’t likely until after that.
Some (few) new ventures start thanks to a grant.
So how do you quickly raise money to start? Though I don’t advise it: one goes into debt. Or ask friends and family.