My DD has 13 cats (I think, :roll: ), 6 out and 7 in. She clips inside every 2 weeks and out once a month or so.
If I am doing the clipping, I put the cats back end under my left armpit, grab paw with left hand, press pad down, clip nails on that paw, move to next paw. For the back paws, I reverse the procedure and put the head under my armpit and clip. Of course you can't do this with a cat that will fight as they may bite , so, here's pics of how I hold while DD clips for those persnickety cats.
You can't be scared of grabbing the scruff of the neck and holding tight. Gently pull the cats head back towards you sllightly so they cannot get at person trimming. See how I use my forearm to hold down the rear end and legs to keep the cat from using rear legs to push off or scratch? This is painless, you are in control, and as soon as person is done trimming, gently release as you are petting cat and scratching scruff and usually they just walk away. DD and I have never been bitten or scratched this way and we have trimmed thousands of cats when we worked the shelter. Piece of cake.