"Because of my age when I was taught typing, they didn't really focus on the numbers or symbols, and even today I have to look if I am typing numbers, but it was a good foundation for a lifetime of typing skills."
They did numbers and symbols when I took typing. But for many symbols I often have to look. Part of this is probably how little I use symbols.
But it also really doesn't help how keyboard layouts have changed. The basic QWERTY has been unchanged since forever. Symbols have changed--and in some cases, possibly more than once. I learned on an IBM Selectric. Then, I went to using my parents electric portable, which had several changes. Then, I switched to an old manual typewriter sourced from a yard sale. (Call me crazy--many people back then did--but I really liked it. Partly because it was mine, and I could use it when I wanted, although my parents were pretty flexible about letting me use their typewriter. But I also did not like the high sensitivity of my parent's typewriter keys--it made my typo rate go higher than it would have otherwise.) Then I went to computers, which often were inspired by the IBM Selectric, but did some things differently. I made the first 3 changes mighty fast--fall ninth grade, IBM; spring ninth grade, parents typewriter; summer after ninth grade, my manual was acquired. I had to relearn some things two times in less than a year. I'm sure I only bothered with the stuff I used--quote key, for example, and not the cents key. And I imagine there were moments with seldom used keys that I was in temporary limbo, simply because it might be in 2, 3 different spots.
I don't know if memory of years gone by lingers, or if it was accident. But not too long ago, I was using an old typewriter to address an envelope. The funny thing was that I automatically typed the lower case "L" for the 1. It was wrong for that typewriter--it has a true "1", but I wonder if my mind hadn't shifted into "old typewriter mode" somehow.