The "key" point of learning CW is practice-practice-practice ...
If you have HF in your car,
and W1AW is transmitting code practice during your commute,
you can get a lot of practice under your belt by monitoring that.
ETA:
The end-goal is for a sequence of sounds to cause letters and entire words
to spring magically into your head.
W1AW only transmits a few minutes at each speed.
After you have been studying for a little while,
there are some fascinating aspects to that:
If they are progressing from slower to faster
over the course of the hour-long session,
then it will reach a point where you are sweating
and it all falls apart.
But it will turn out to be faster than the speed where you
lost it the week before.
(It helps that every portion at a certain speed has a fixed
prologue with just the speed number changed. You will
quickly be able to recognize that even when everything else
is a hopeless blur).
And if they are sliding down from faster to slower,
each time you will first hear an incomprehensible hash of beeps
that are far too fast to understand.
But eventually during the hour it will slow down to a rate
where you start hearing comprehensible snatches of letters, words, sentences.
And once it gets slow enough for it to all click in your head,
you will discover that you are copying at a faster speed than
scant weeks earlier.
At the end of the session, the slowest speed will seem glacial.
(Don't tune away just because it's too fast to copy. Your brain is
getting rewired to recognize the sounds even when you
have no idea what is being sent).