I have wrinkles, I have grey hair, I have back problems, high cholesterol, high blood pressure, I can't remember anything, the world seems confusing and complicated to me now and I wish things were simpler (which is why I like Lemmy). I definitely don't get kids today or their music.
How am I so old?
I don't know if you mean Apple IIs, or the scene in the movie.
If you want to learn how computers work, the Apple II was, and arguably still is, a great platform. 8-bit programming is still fairly comprehensible to the novice, and the MIPS assembly language that is used in academic textbooks draws a direct lineage from the Motorola 6502 instruction set.
I learned basic 6502 programming on my Commodore 64 in the 80s, and I was shocked when I took a computer engineering course in 2010 that used MIPS assembly for the examples. It wasn't just easy to understand, it was the same in virtually every respect. I had no problem at all following the code.