Honestly, Elder Scrolls V: Skyrim. The game has like 7 difficulty options so you can choose what feels good for you (and you can change the difficulty at any time), but it's honestly pretty easy even on the higher difficulties (there are mods to make it more difficult but you can worry about those later). The game is pretty forgiving with frequent auto saves and manual saving available at any time so even if you die you don't lose much. Controls are basically standardized at this point, so it will be easier to pick up other games after the fact, and the variety of playstyles available will get you accustomed to a wide range of controller handling styles.