Go Back to the Shrine of Resurrection
As soon as Link wakes up in The Legend of Zelda: Breath of the Wild, the game sets you off on your journey, and you’ll start fighting monsters and solving puzzles in Shrines. However, you’ll likely be doing all of that in nothing but Link’s boxer shorts. Though the monsters aren’t much of a threat during the early hours of the game, you really should get some new clothes for Link as soon as you can.
The game’s most basic set of pants and shirt can be found back at the Shrine of Resurrection where you first woke up. Once you complete the first couple of Shrine puzzles for the Old Man and unlock the fast travel function, you can go back to the Shrine and you’ll find two treasure chests holding clothing. Have some decency and put those clothes on.