I started with a 5/8. Almost everybody does. I still shave with 5/8 razors.
5/8 are not beginners razors just razors everybody begins with when starting this better way of shaving. If you like your 5/8 and do no become a shaving related addict it will serve you and your children and their children well. To most of us on SRP this has become a hobby or rather an addiction. Just yesterday I bought soap and shaving cream from three different vendors, oh and another hone

Start out with shaving and stropping. If you learn that well and are satisfied with that you will only need something to touch up a blade and paste or a barbers hone can do that.