Very well written post on how to become an airline pilot. I would add one additional item. Hire a professional company to walk you down the airline application and interview road. I recently retired from a major airline after 35 years and decided to keep flying. I am working a Gulfstream corporate pilot. My transition to the corporate world was made easy by hiring
https://ravencareers.com/ Their professional advisors were invaluable in my transition to the next flying phase of my career.