Will laser hair removal reduce skin trouble after shaving?

Hello. I tend to shave frequently, but I often experience stinging or redness afterward, so I am looking into hair removal. Shaving at home is more of a hassle than I thought, so I am considering getting laser hair removal. I am wondering if laser hair removal would reduce the frequency of shaving and potentially lessen this skin irritation. Since my skin is sensitive, I would also like to know how long the redness or stinging might last after the procedure. If this is my first time getting laser hair removal, I am also curious if I need to shave myself before visiting. Additionally, I would appreciate it if a clinic representative could let me know how long the hair has grown before the procedure, and if it is okay to shave very short.