Peter Parker was bitten by a radioactive spider and became Spider-Man. Bruce Wayne's parents were killed, and that led him on a path to becoming Batman. The Green Lantern Ring found Hal Jordan and had him join the Green Lantern Corps. Each of these heroes shares a common thread: they unwillingly became superheroes. If some of the most famous comic characters became superheroes by accident, then gaining superpowers on purpose shouldn't be that difficult.
Source：https://www.cbr.com/easiest-ways-gain-superpowers/
