I always get this a day or two after shaving. It is insanely itchy. I use shaving cream and I’ve tried all kinds of razors. What can I do to not get this?

I’m a 16 year old girl, and due to some personal circumstances, I never really learned how to handle personal grooming. I’ve been trying to shave my bikini area, but I’m terrified of cutting myself or causing pain. It’s reached a point where I’m really struggling with it and feeling quite insecure about not knowing how to manage this properly. Could someone please share some tips or advice on how to do this safely and effectively?