I quit my job, dropped out of college, and got my real estate license at the age of 21. It was the best decision I ever made. I wanted to build my rental portfolio as well, but it's hard to do the BRRRR method without first having the cash to buy the property.
I worked hard, but made six figures my first year, tripled that my second year, and am hoping to at least double that again this year. I've now done well over 100 real estate transactions, and several investment deals. It all starts with getting your income up first. And you'll certainly be more confident buying real estate and knowing a deal when you see it after selling a bunch of real estate. It's not for everyone, but I think your plan is similar to what mine was, and well.. it worked!
$6,000 is plenty to do some marketing on either the agent or investor side (I've learned the marketing is basically the same when targeting sellers). Then you either list it and sell it, tie it up and wholesale it, or find a partner with cash who will provide the funds, and hopefully experience to flip it. You either have to have the money, or find the deal. Then hustle.
Study hard and stick to it. It's hard work, but well worth it!