Don't be afraid to put some of your stuff out there and reach out to anyone and everyone. I got my start by posting scripts on Twitter and Reddit and DM'ing writers I admired and managers who repped writers I admired.

You'll get 400 no's and 99% of people ignoring you but there are the people that will help you throughout your career. Jon Hurwitz who made Cobra Kai and Harold and Kumar responded to me when I was 21 and I still work with him 15 years later and he's been insanely supportive throughout my career. You never know who will like your stuff!