A hard-won provision of the Affordable Care Act allows young adults to stay on their family’s health insurance until age 26. But after that, those without employer-sponsored insurance face an array of complicated choices, including whether to shop on the insurance plan exchange, apply for Medicaid, or roll the dice and go uninsured. Are you a young adult confused about navigating the exchanges used to pick plans? Have you bought a plan on an ACA exchange and found that it didn’t cover care? Have you married or taken a job just to get insurance? Did you decide to go without coverage? Whatever y…