I clipped my cats’ claws with a regular nail clipper, though there are clippers designed for the purpose. I found the cat nail clippers available were not sharp enough and so tended to split the claw so I just used my own clipper which was sharp.
You have to hold kitty still and you have to watch out for those back claws while you are at it. For my cats who objected I sheeted them up to the rib cage (this means you wrap them in a towel or sheet) and tucked them under my left arm. I have had a number of cats who did not object so I just tucked them in the same position.
With your left hand (if you are right handed) you hold the leg and press gently on the pads under the foot to make the claw extend. If you look at the claw from the side, you will see a pink or dark colored area (the quick) with a blood vessel extending from it. Don’t cut that. Then you just cut the nail. If you can’t see the quick, just cut off the points and you’ll be fine.
There are also claw sheaths or little tiny nerf balls you can glue on, but I never had a cat I thought they would stay on so I never tried them.