Many prestigious contests offer cash prizes, mentorship opportunities, and exposure that can help launch your career. 8. Pitch your ideas - Once you have a solid portfolio of scripts, start pitching your ideas to production companies, agents, and managers. Be prepared to sell yourself and your work, and be open to feedback and revisions. 9. Never give up - The road to becoming a professional screenwriter is long and challenging, but with perseverance and dedication, you can achieve your goals.