>I am mostly counting the number of sharps and flats and translating that to the keyboard through a pattern I figured out early on. The sharps “activate” from left to right across the groups of black notes, starting with F♯, alternating between the two groups of black notes. This is easier to get into your fingers than any other memorisation technique. The order for flats is mechanically symmetrical – you just start from the right and move left, again from the “first” note in the group of three, which in that case is B♭. I am still not quite sure how other people are learning this, since most of the materials I’ve seen have focused on learning the actual names by rote, using mnemonics like “Father Charles Goes Down And Ends Battle”
Is this what self-taught looks like? I have never heard of that mnemonic and it was never hard to learn the order of sharps/flats in a key signature. You just look at the way it's written on the staff - two lines of sharps a 4th apart going up progressively, two lines of flats a 4th apart going down progressively.
I don't want to discourage the guy, but practicing every day for 4 years straight and he's only gotten to 60bpm... there are better methods to learn piano sight reading.