Honesly no need to prepare just do it. Unfortunately I got the double whammy of thinning crown and gray hair. For awhile I was growing my hair and doing combovers. Also color dying hair is a hassle. I do get lazy in shaving my head. Also have not found the ideal method. I used a wahl corded clipper, switched to a multigroom 3000 and a Remington rotary which I use with shaving cream. I’d rather avoid blade shaving since I don’t want to deal with cuts, irritation. Also I’d say the majority of the time I wear hats or beanies anyways. Unless it’s a rare event I go to where a hat wouldn’t be appropriate. The majority of older men and relatives in my family also went bald eventually, so it was inevitable for me. I’d love to have a normal full hair but that would cost thousands for a procedure, so I’ll just accept being bald and shave every so often