Ok, I'm going to take the other side here.
A college degree is absolutely useless when you have the mindset that you do. It is especially useless if you're taking on student debt. I obviously don't know you at all, but from the way you write, I can tell that you've got a good head on your shoulders. You've clearly put some thought into this and what I would say is, take everyone's advice with a grain of salt. At the end of the day, everyone has their own biases and own life experiences that are factoring into their replies here.
With that being said, I got my college degree 8 years ago because it was just the thing to do. Anything else would've been absolutely unacceptable to my parents. I didn't even consider entrepreneurship and not working for someone else as possibilities, even though that's what I had been wanting all along. I can tell you that every job I've held since college has been soul-crushing and not related to my degree at all.
Speaking of degrees, I noticed you said engineering wasn't what you thought it would be. That's the case for every major that you can pick, and that's the big problem with college. Asking kids who are in their late teens to pick what they're going to do for the rest of their lives is ludicrous. No one has any idea what that job looks like on a daily basis ... and especially what that job looks like 10 years from now. Technology is advancing so rapidly that there is no way colleges can keep up. They are ancient institutions and haven't evolved since they began. Now you see some schools offering online classes for free (which is diluting their brand, because it is now less prestigious to have a degree from a big time school when I can just take those courses online for free).
A college degree matters less and less every day. In 10 years, it probably won't matter at all. I say that keeping in mind what you wrote in your original post - that you have that yearning to put in the WORK and learn RE investing. If you have that entrepreneurial drive and hunger, you will be just fine learning on your own. I was nowhere near your mindset 8 years ago.
Another thing to keep in mind is that your mind will change over time. You can really like RE investing now, but when Virtual Reality comes around, maybe you really get into creating VR games. You have to realize that interests change over time. And that's completely ok.
Getting a degree in something "general" is a COMPLETE waste of time. You learn nothing that you're going to use in the real world. Unless you're going to be a doctor or lawyer or something specific that requires a degree (and it doesn't sound like you are), I'd say drop out. BUT, you have to understand that you need to be practical at the same time. You need to make money (unless you're going to live at home and your parents are going to support your entrepreneurial ambitions). As long as you're willing to put in the WORK, you don't really need college.
/rant
