How do I build my initial lump of capital to start investing?

[Account Closed]

So it is officially day 3 of my self study into the world of real estate investing. I still have much much to learn. But one thing that strikes out to me is that all of these examples of RE investing (flipping, wholesaling, buy&Hold, etc) all require having a down payment for a mortgage and some means of generating cash flow to pay off said mortgage. As well as more capital for expenses and building up equity.

And I am here like "wait, where am I suppose to get these tens of thousands of dollars to start off? I am just a kid with practically no money in the bank?" 

Any sort of advice would be nice, but specific advice for renting out & generating near-immediate cash flow for reinvesting & expenses would be even better.