The Alto version has the music notation, so you can transpose the Eb to Bb.
I'll leave how, for you to research. 🧐
Transcribing, is listening to spoken words or music, and writing it down.
With Johnny, you want to listen to the lyric's tones, and find them on your horn, and then you have two options.
Just write the letter of the tone on paper, or just mark a dot on manuscript paper.
You can deal with the note/tone duration later.
Modern electronics allows for slowing down and repeating as necessary.
Repetitive lifting of a tone arm, is so old school. 🙄
Singing along with Johnny is also a good first step, except for one note. 😵💫
Getting the tones for .....
Look At Me
is a good place to start.