Shaving 😣🐱

Im only 16 right now & i don’t rarely shave down there because nobody sees or touches me down there so I see no point , anyways I shaved down there 3 days ago & I get a lot of razor bumps , what do I do? And another reason why i don’t shave is because i feel like those razor bumps will stain my skin and make it look darker. In need of help girls !!! How do I shave , what do I do? And why I get a lot of bumps!!