I am primarily left sided, but have always been somewhat ambidextrous. In my early twenties I spent a year or two driving a car with the gear shifter in the console between the seats, and a year or two later I suddenly noticed that I was getting better at using my right hand to do things. I would suddenly realize that I was handling full cups of liquid with my right hand--I had picked them up with the right hand without realizing it. Now I can pour with either hand, but the left is preferred. I have had a number of cars since then, some with console gear shift, and some with it in the steering column. I do think having to use the right hand to change gears did make me more ambidextrous.
I can use the computer mouse with either hand, but prefer using it with the right hand. The qwerty keyboard is more suited for the left hand, so on those occasions when I want to keep one hand on the mouse, and one on the keyboard it feels more comfortable to have the mouse under my right hand and the keyboard under my left hand.
I tend to use my left eye more for long distance, but it is better at that, as my right eye has poorer vision. I do tend to use the right eye more for reading books and the computer screen. I think my left eye is more light sensitive, so the screen light may be too much for it. My next computer eyeglasses will be the kind that turn dark in bright light conditions. The ones I have now don't, but my driving glasses do. It does make a difference.
I have always put the phone by my left ear, partly due to handedness, but also partly because my right ear doesn't hear as good as the left one.
I have two bad knees, so which foot goes first tends to depend on which knee is up to the job. from birth I have had two outward turned feet, the right more than the left, so I have an odd walking gait. I had to wear corrective shoes as a child, which I hated, as they were very uncomfortable. They only partially corrected the problem. I eventually reached an age when it was difficult to make me wear them. Since they were expensive, weren't really doing too good a job of fixing the problem, and I hated them, my parents finally stopped buying them. If the shoes had worked better, then it would have made sense to keep getting them, but I think my parents were right to stop when they did.
I like being able to do stuff with both hands but there is a down side. Sometimes my brain gets confused, and can't make up it's mind which hand should get the task. When that happens I tend to fumble a bit. lol