Like yourself, I'm having a break from the machine and doing some hand stitching and then will be hand quilting.
There is 'hand' quilting cotton that is slightly thicker, but I've found that machine quilting cotton is just as good for hand quilting.
Hope you enjoy sitting and relaxing whilst you quilt.
Just an added thought... thread a few needles before you start sewing. Once I was 'on a roll' and trundling along those seams, it's better/easier to have a needle at the ready to carry on with. :-)