Fellow Longhorn here: you sound a lot like I did in college and I'm going to give you advice as if I were speaking to myself. First off, switch majors into one you'll enjoy but is still employable. Even if real estate goes well for you, you'll likely need a W2 job for a while to help with traditional financing. Use these next few years to learn all that you can about real estate and determine if it's something you truly enjoy and have a passion for, or if you're only seeing it as a way to get rich. Don't wait to get started though, the market is hot right now but that doesn't mean it'll cool off anytime soon, it could continue to rise for many more years. Time in the market beats timing the market. Just make sure you're buying smart.
Don't waste your time with stocks. You're not going to trade that $1000 into anything meaningful. You'll likely burn through it in a few weeks trying to day trade. Instead, use that money to start marketing for wholesale deals. It'll give you a taste of the real estate investing world. Finding deals is key and some people just don't have the courage or outgoing personality to talk on the phone or meet with motivated sellers. If that's not for you, you'll need to pivot to another strategy but the majority of those will take initial capital.
As a college student, the thing that you do have right now is time. Use that to your advantage. Try to partner up with someone to have them show you the ropes and maybe split a deal. Keep your living expenses low and put any money you earn back into your business. In a few years your hard work could snowball into something great.
