Knitting with one needle under arm

I knit like that Streaky, it was how I was taught too. I tend to knit perched on the edge of the sofa, at an angle of 45 degrees if you see what I mean, so that I'm not banging into the arms. Its probably not too good for my posture but I'm used to it now.

My mum, now in her eighties, has the needles under both arms. No idea how she manages that!

Was it a twist pattern or did she use her fingers?

I've done a type of cable without using the cable needle but it was a while ago.
No-one wants granny's knitted garments now, they are into sports wear!

Callistemon
I've just watched a YouTube of a woman knitting like that.
But she also demonstrated knitting cable without using a cable kneedle.
Can you do that?

I've seen people doing this but never managed it.

It may take perseverance but you should be able to master a different style - try following YouTube videos. After years of saying I couldn't crochet, that is how I taught myself last year (same age as you!).
Yes, you can learn new tricks