Peter Parker was experimented on by evil scientists who put a bio-mechanical spider in his gut which exploded, turning him into a bio-mechanical spiderman. He committed evil acts for the evil scientists until he ran away and was found by a nurse, [name tbd], who began taking care of him. He decided to start using his powers for good and became the friendly neighborhood spiderman we all know and love!
I know he deviates from canon a bit, but I'm following my dreams (the idea came from a dream)