Be willing to relocate to pursue job opportunities, which are best in large, metropolitan areas.
Talk to archakas about their careers. Ask them for advice on entering the profession.
Learn as much as you can about Hinduism by reading books and taking classes.
Visit several Hindu temples to learn about various forms of worship, and to watch archakas as they lead services. Visit https://www.hinduismtoday.com/magazine/october-november-december-2012/2012-10-educational-insight-visiting-a-hindu-temple for tips on visiting a temple and worship practices.