Shaving down there...

Hi so I just shaved down there for the first time. I trimmed the hair first then I shaved (in the direction it goes). I just have to after care questions.

1) how to prevent ingrown hairs

2) will it itch/ irritated when it grows back

3) how often should I shave

4) how to get 100% of the hair because the closer/further I got the hair is a little longer

Sorry for kinda the long post