Probably 3:xx, but I don't remember. I didn't time my earliest non-alg sheet attempts. I do remember that I got a 2:32.xx PB (Stopwatch) a few days after learning.
4.xx, had just moved up to high (comprehensive) school which you do at age 12 in UK, circa 1981. Gotta love the ~10 look last layer, early beginner method I used :fp
2:40. My 1st solve after watching Dan Brown's video and without looking at algs.
I had already solved the cube with the fail method though so I could build the 1st layer with ease.