My dad always owned manual transmission cars, until periodic arthritis flare-ups made it too painful to constantly be shifting gears. But he did let me have a go at driving one. He said that I seemed to pick up on it rather quickly. I didn't think it went so well, so I don't know how it went. 

Once the car was moving, shifting was terribly simple. 
Getting it moving wasn't so easy. I was told that I would be able to easily feel when the clutch "grabbed," or something of that nature. If anything was supposed to be felt while pushing the pedal, I never found it. I had to go by the distance the pedal had been pressed to approximate when it was ok to give it gas.
On the plus side, I never made that awful gear-grinding sound. I just stalled the car constantly when trying to move from a stop.
I don't have much benefit for manual transmission in any case. A car is a way of getting me from one place to another. Manual transmission adds one more complication to meeting that goal. 
I 
did recently test-drive a car with the CVT type transmission, and its manual-shift capability simulates 6 gears. 
That kind of manual transmission is fine with me - since there's no clutch to bother with, it's quite simple, and it's optional to use it at all. But the manufacturer also says you get better gas mileage if you let the car figure out the gearing ratio.