Trim length

Hi, so I have always shaved down there and with the razor bumps and the knicks I get and then the itching I'm just done with it. But also I don't want to let it go crazy. So how short do I trim like pretty close to the skin or a little long, also like sorry for the tmi but not all the hair stays on the outside you know, like some is more in the lips trim that as well. 🤣 Sorry I'm new to this bc I normally get rid of everything but thats just too much work