To become a licensed practical (or vocational) nurse, you must attend LPN training school, successfully complete the program, and pass an exam called the NCLEX-PN. You then can get a license to practice in your state.
Amy (not her real name) is a licensed practical nurse in California. She got her LPN five years ago. Her first job was in an extended care facility (nursing home), the graveyard shift in the middle of the night. Amy did well working at the nursing home. Within a couple of years she was the supervisor of the aides on the graveyard shift. She had 70 patients under her care. It was hard work, which she didn't mind.