Besides being left or right handed, there are other factors such as using either your left or right eye for viewing or if you wear glasses and whether shooting horizontally or vertically. For me, I use my left eye which is stronger to shoot a horizontal scene and tightly brace the back of the pentaprism against my left forehead eyebrow area. For verticals, I use my right eye while my nose clears the pentaprism and I brace the camera above my right forehead.

Lately, with the usage of mirrorless, I've noticed that some photographers are shooting with "live view"
and holding the camera in front of them (like cell phones) which introduces other problems. Cheers. Ed

This is about as basic as things can get. But, I know there are new enthusiasts on UHH all the time and though this is entry level it is surprising how often I see people that haven’t learned it. While I would never walk up to a stranger and embarrass them, here on the forum people can learn in anonymity

Support the camera/lens with your left hand under the lens/camera unit at about the balance point. Do not grip the camera by each end! To hold your camera this way introduces tension and involuntary movements. And it is tiring.

Place your elbows against your body. Don’t have them sticking out to the side like a bird about to take flight. Against your body reduces the possibility of them flapping.

Lean into the shot a bit, bracing the camera against your forehead/ eyebrow area.

Spread your legs apart just enough for good balance.

Finally, when you are ready to take the shot, squeeze the shutter release. Do not poke or jab at it.

All of these points attempt to create a tight platform from which you can shoot while minimizing motion blur. If you can also lean against something stationary like a building or a FAT tree, so much the better.

For the record; I totally understand from personal experience what happens to us in the over-the-hill-gang. I posted this short piece for beginners of any age and still use those techniques learned over 50 years ago. Yes there are days where I don't want to move at all but when I do get out with this old and unsteady body proper technique is my crutch. ( I also use a tripod but it is tall enough that I don't have to stoop). I'm in my 80th year and sure do know about pain.
Problems are opportunities for us to see how ingenious we can be.
And again for the record, I am also legally blind but, see well enough to point a camera in the right direction and with my brides help, get it set up. Quit is a word in some foreign language that I'm unable to translate.
As far as this little thread goes, what is the worth of all that which we have learned in our long lives if we don't try to pass it on? To try to give others a step up?