LOS ANGELES — William Taylor III, once a lifer in state prison for two robbery convictions and the intent to sell a small packet of heroin, was savoring a moment he had scarcely dared to imagine: his first day alone, in a place of his own.

“I love the apartment,” he said of the subsidized downtown studio, which could barely contain the double bed he insisted on having. “And I love that I’m free after 18 years of being controlled.”

“My window has blinds, and I can open and close them!” he exclaimed to visitors the other day, reveling in an unaccustomed, and sometimes scary, sense of autonomy.

Mr. Taylor, 58, is one of more than 2,000 former inmates who were serving life terms under California’s three-strikes law, but who were freed early after voters scaled it back in 2012. Under the original law, repeat offenders received life sentences, with no possibility of parole for at least 25 years, even if the third felony was as minor as shoplifting.