I am going to suggest a Fiskars 24" rolling ruler.
Hang on as I am going to check to see if they have any
left on Amazon.com. Yup - tho just a few.
It is called the Fiskars rolling ruler. Let me explain. It has a ruler on the left and then a metal guide. The rotary cutter
slides up and down along the guide and is covered with a cuff.
The result is that all you do when you have your fabric placed
correctly is push down slightly and the cutter moves as you
move your hand which is cupped over cuff. This would move
a great deal of the pressure from wrist to hand. The palm to
be exact.
Also, this ruler has a sticky soft rubber under the glide to keep
it in place, which does not mean you don't have to hold it in
place but it is way easier.
Read the reviews, but quickly, I am sorry to report that Fiskars is not making this ruler anymore and Amazon and one quilt shop have a few left. The best product ever w/no advertising!
I have two now as in trying to find one for a holiday gift I found they were no longer made. This is the most innovative quilting tool ever made. They now produce a little tiny one by Debra but is not, not the same at all.
The Fiskars rolling ruler is $60.00, a big investment for sure but
let me give an example. My quilt group was doing Grandmothers Dream quilt. We had to cut 32 strips wof or width of fabric of 8 fabrics. I did mine in less than 2 hours with
breaks to do laundry and sit down. The gals w/o this ruler took two or three days and all had sore hands.
I haven't used my other big rulers since I bought this one. I would highly, highly recommend this to anyone but especially to anyone who has difficulty cutting.
There are not many left and I believe the shipping is free.
Hope this helps you on the road to quilting. Oh, in Australia, they are $110.00 and the same in Europe.