pro tip,
shave in the direction your hair is growing. so, if the hair is /, then shave -->, not <--. And vice versa. don't press, but glide along. and use a femme razor, if you can! it reduces the itchiness and red bumps a lot.
After shaving put up a gentle cream for sensitive skin, one for hydration without perfumes or any of that shit. that prevents your skin from being irritated overmuch.
also, don't shave everyday, your skin will become irritated. once a week is fine.
helps a ton!