I shaved as needed with the original BIC disposables from the age of 15 thru high school. I didn't really become a mature, daily shaver until I was a freshman in college, when I started using a Gillette Black Handle DE in 1985.
I think this was around 1958-59 when I was 5-6 years old, in Montréal. My "razor" was a plastic...
My first real shave was with an electric that my parents gave me, then I switched to a Gillette Super-109.
I'm pretty sure if I turned everything in the house upside down I would find it, but it's been 30 years and 5 moves since I've seen it.
My first shave was with the same 1959 Gillette Fatboy that I shaved with today. Dad was a barber and taught me to shave with a straight before I went to college. That gave me some serious cred in the hall bath.
I started with a slim adjustable. Dad had an identical one. I still hold out hope that they are packed away somewhere in the attic but I haven't been able to find them. I guess I was 14 or 15 when I started shaving.
1980 with a Fatboy my dad gave me.
I was 15.
Never used anything but a DE since than:
The a/m FB from 1980-2000.
A Merkur 34c from 2000-today.
And a Fatip picolo my wife gifted me in 2016 that I also often use.
Only 3 razors in 40 years...of daily shaving ,not bad...
First ever shave was with a disposable. I'd moved on to twin blade cartridges by the time I left school at 16, but it wasn't long after that (certainly within two years of starting work) when I ditched cartridges for DE. DE blades weren't easy to find in the early 90's, but they were worth the hunt.
First shave was around 12/13 years old, sporting a beard at 14 in junior high, late 1960s. Was in Switzerland at grandparents, my grandfather taught me. It was his old DE, whatever brush, and plain old soap. He gave me a brush and razor, no clue where they ended up.
My dad had one of these that I also used:
After too many years (half a century) of electrics and cartridge with aerosol lather am getting back to DE with brush and shave soap