My two favorite ways to get my photo taken is to be behind a tall chair like a wingback or recliner, cross my arms on the top of it, leaning forward a bit. No uni or double chin and arms aren't squished against body (adds bulky look).
My other way is to have a nice medium height chair where the back faces the camera, the model sits sideways (but slightly toward camera), puts one arm up on the chair and grabs that wrist with the other hand and turns the face more toward the camera.
If that doesn't make sense, pm me and I'll send a couple of photos from my recent 50th birthday party.
Debbie
(recently turned half a century
)