And I concluded:
I have no experience nor tips should the photographer be single left handed.
In your case, I did not know the extend of your injury but I am happy to read that
you find someways to still go on shooting. Now that I know, I would like to read
about your solutions
there's nothing really to tell
the crazy thing is i have had to pick my camera up just to answer this question because i don't even think about how i hold the camera and now that i have taken note of how i hold the camera for short lenses i just use me left hand bottom left corner of the camera to hold it and the heel of my palm which i still have on the right side of the camera and my thumb to press the shutter for landscape, for portrait i grip the camera with my left hand over the top and use the heel of my right palm to steady the camera at the bottom
longer lenses i hold the lens with my left hand and use my right thumb to press the shutter in a similar fashion to using short lenses for landscape, for portrait i will steady the lens with my right heel and hold the camera in a similar fashion to shooting portrait with a smaller lens or i might hold the lens with my left hand and use my heel n thumb of my right hand to steady the camera and press the shutter
it all depends on what feels comfortable at the time and like i said i don't even think about it
as far as aids are concerned i have monopds , bean bags and tripods which i tend to use with a remote trigger for one reason or another i find them easier to use with with a remote trigger
in the past i have tried one of the pistol grips but not with a long lens i tried it on the tripod mount of the camera but this was on a consumer body with a fairly small lens
the pistol grip had the old cable release trigger which i modified to work with digital cameras but the whole affair felt flimsy and was a little awkward to use, this was a good few years ago and at the time i didn't have any long lenses with tripod collars but it might be worth re investigating now that i have
the compromise for how i hold and use a camera is pressing the shutter the way i do tends to tilt the camera a little meaning most hand held shots are slightly slanted but it's nothing that can't be easily corrected in PP
as far as steadying the camera hand held for slow shutter speeds it's a bit of a gamble sometimes i'm successful but more often than not it's a challenge, knowing this just means i probably push the ISO higher than really needed to keep the shutter speed up but it's all doable
i see people in much worse predicaments than me doing all sorts of marvellous things there's a young lad who is paralysed from the neck down who enjoys his photography through aids and using a computer which i think is one hell of an achievement and makes my predicament a trivial matter which i think it is anyway