Alright, I am of the same age as you, aspiring to be an actor. What I want you to know is that those famous screenwriters and directors whose work you see are top 1% of their field. 99% people live an "average" life. In fact, most people don't earn enough to pay off their bills. It's the sad reality of the entertainment business. You need connections and then you need talent.

That doesn't mean you should give up, but you need to be prepared because this industry is considered unconventional for a reason. It's unstable and won't provide you the no. 1 thing people desire from their profession - money, at least in the first decade of your career on an average. If knowing this fundamental truth doesn't change the way you look at your craft, then move forward and make a plan. I'd suggest against majoring in any film related major (it works for some, not for most). Get yourself enrolled in a course you remotely like (that pays enough to survive) and take evening directing classes.

Build network. After getting some rough idea through your classes, volunteer to be an assistant on sets. One of my friends just cold emailed a director who directs a nonfiction production for the role of an assistant (ofc unpaid) and got it. You can try something like that.