I'd spend some time learning how to find Geo/Industry .com and a few two keyword domains that make sense. Target a few large cities with expireddomains.net searches and filtered for deleted and expiring domains, then gradually build a portfolio.
If you study a little bit first and pick good city/industry or state/industry domains. You can turn that 1,500 to a portfolio of a 150 names that you can gain the experience of contacting and selling to endusers. Unless you buy absolute crap, It would be pretty hard to strike out and not at least make your money back offering these names for low to high $xxx a piece.
I dont see how you get anything (experience or educational value added) out of buying a liquid domain for 1k plus and flipping it maybe to double up if the price happens to go up in the next year.
I think learning to how really dig for gems, find end users, approach end users, and negotiate sales will prove to be more valuable than trading to other domainers. Learn the basics then start buying more expensive domains with the returns and experience.
Thats exactly how I got started with about $200 and a bunch of godaddy coupon codes a couple of years ago, and have been stacking up my account and portfolio with house money ever since.