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Flight attendants are responsible for passenger safety before, during and after a flight. They attend to travelers' needs, from simple drink and food requests to serious medical situations. Certification and training are requirements for this position. Most employers also require flight attendants to have a high school diploma or GED, while others prefer candidates with postsecondary education. Additionally, international airlines generally seek flight attendant candidates who speak one or more languages of the countries they frequent. Source: *U.S.
Once you are selected, you will be trained by your airline in a 3-8 week required, specifically structured, FAA approved training program that is security sensitive and cannot be duplicated elsewhere. There may be online sites that offer courses or training in becoming a flight attendant.