I do not. Everyone tells me I'm supposed to, but if you give them shit to scratch they take care of it themselves, for the most part. And except for Fabio when he decides to literally jump at his own shadow when he's sitting on me, they don't scratch me anymore. When I first got him he was scared as fuck, and he scratched the shit out of me, but I guarantee I would have gotten shredded worse if I tried to cut his nails back then anyway.
It probably isn't a bad thing to get a cat used to early on, same with baths, but I've never done either to my cats. If I had a new kitten I might start off getting them used to those things, but I've always gotten ones that are a year or more old from the pound, and if they weren't raised with it they freak the fuck out. Some hippie faggots give me dirty looks when I say that I don't do any of that, but they probably dress their animals too, so fuck them. The most I do is brush them, and honestly that's mostly because they love it more than trying to limit cat hair. I know that I unknowingly consume cat hair all the time whether I brush them or not, so fuck it.
The scratching will ease up or even stop as he gets older. Particularly if you let him know that scratching you isn't cool.